29681612541 has 40 divisors (see below), whose sum is σ = 50689366464. Its totient is φ = 16955568000.

The previous prime is 29681612483. The next prime is 29681612557. The reversal of 29681612541 is 14521618692.

29681612541 is a `hidden beast` number, since 2 + 96 + 8 + 1 + 6 + 12 + 541 = 666.

It is not a de Polignac number, because 29681612541 - 2¹⁸ = 29681350397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29681612141) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2416666 + ... + 2428916.

Almost surely, 2^29681612541 is an apocalyptic number.

29681612541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

29681612541 is a deficient number, since it is larger than the sum of its proper divisors (21007753923).

29681612541 is a wasteful number, since it uses less digits than its factorization.

29681612541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16543 (or 16534 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 29681612541 in words is "twenty-nine billion, six hundred eighty-one million, six hundred twelve thousand, five hundred forty-one".