29490737681 has 8 divisors (see below), whose sum is σ = 30577166400. Its totient is φ = 28408942800.

The previous prime is 29490737677. The next prime is 29490737693. The reversal of 29490737681 is 18673709492.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29490737681 - 2² = 29490737677 is a prime.

It is a super-2 number, since 2×29490737681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29490737671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1145495 + ... + 1170956.

It is an arithmetic number, because the mean of its divisors is an integer number (3822145800).

Almost surely, 2^29490737681 is an apocalyptic number.

It is an amenable number.

29490737681 is a deficient number, since it is larger than the sum of its proper divisors (1086428719).

29490737681 is a wasteful number, since it uses less digits than its factorization.

29490737681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316919.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 29490737681 in words is "twenty-nine billion, four hundred ninety million, seven hundred thirty-seven thousand, six hundred eighty-one".