77608383931 has 16 divisors (see below), whose sum is σ = 84769705440. Its totient is φ = 70618348800.

The previous prime is 77608383889. The next prime is 77608383961. The reversal of 77608383931 is 13938380677.

It is a cyclic number.

It is not a de Polignac number, because 77608383931 - 2⁷ = 77608383803 is a prime.

It is a super-2 number, since 2×77608383931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77608383961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1782540 + ... + 1825558.

It is an arithmetic number, because the mean of its divisors is an integer number (5298106590).

Almost surely, 2^77608383931 is an apocalyptic number.

77608383931 is a deficient number, since it is larger than the sum of its proper divisors (7161321509).

77608383931 is a wasteful number, since it uses less digits than its factorization.

77608383931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45006.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 77608383931 in words is "seventy-seven billion, six hundred eight million, three hundred eighty-three thousand, nine hundred thirty-one".