77900532431 has 8 divisors (see below), whose sum is σ = 81431347200. Its totient is φ = 74433336120.

The previous prime is 77900532407. The next prime is 77900532469. The reversal of 77900532431 is 13423500977.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77900532431 is a prime.

It is a super-2 number, since 2×77900532431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77900532401) 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, 15902111 + ... + 15907008.

It is an arithmetic number, because the mean of its divisors is an integer number (10178918400).

Almost surely, 2^77900532431 is an apocalyptic number.

77900532431 is a deficient number, since it is larger than the sum of its proper divisors (3530814769).

77900532431 is a wasteful number, since it uses less digits than its factorization.

77900532431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31809229.

The product of its (nonzero) digits is 158760, while the sum is 41.

The spelling of 77900532431 in words is "seventy-seven billion, nine hundred million, five hundred thirty-two thousand, four hundred thirty-one".