Compare and order these numbers using the given methods. Use signs (<, >, =) for comparison and arrange in ascending order.

If they are different, the number with more digits is larger.

1. Compare 123654 and 335461. Both numbers have 6 digits. Comparing the first digit: $1 < 3$. $$123654 < 335461$$
2. Compare 76732 and 42654. Both numbers have 5 digits. Comparing the first digit: $7 > 4$. $$76732 > 42654$$
3. Compare 19452 and 19261. Both numbers have 5 digits. Comparing from left: $1=1$, $9=9$, then $4 > 2$. $$19452 > 19261$$
4. Compare 352431 and 352431. Both numbers are identical. $$352431 = 352431$$
5. Compare 37642 and 334952. 37642 has 5 digits, 334952 has 6 digits. A 5-digit number is smaller than a 6-digit number. $$37642 < 334952$$

Numbers with fewer digits are smaller.

1. Numbers: $13654, 236591, 16236, 7666$

   • 7666 (4 digits)
   • 13654 (5 digits)
   • 16236 (5 digits)
   • 236591 (6 digits) Comparing the 5-digit numbers: $13654 < 16236$. Ascending order: $\boxed{7666, 13654, 16236, 236591}$

2. Numbers: $16923, 19462, 48421, 37642$ All numbers have 5 digits.

   • Compare first digits: $1, 1, 4, 3$.
   • Smallest are 16923 and 19462. Comparing these: $16923 < 19462$.
   • Next is 37642.
   • Largest is 48421. Ascending order: $\boxed{16923, 19462, 37642, 48421}$

3. Numbers: $335461, 35243, 156191, 1534$

   • 1534 (4 digits)
   • 35243 (5 digits)
   • 156191 (6 digits)
   • 335461 (6 digits) Comparing the 6-digit numbers: $156191 < 335461$. Ascending order: $\boxed{1534, 35243, 156191, 335461}$