77925630931 has 16 divisors (see below), whose sum is σ = 83387501568. Its totient is φ = 72565200000.

The previous prime is 77925630883. The next prime is 77925630941. The reversal of 77925630931 is 13903652977.

It is a cyclic number.

It is not a de Polignac number, because 77925630931 - 2¹³ = 77925622739 is a prime.

It is a super-2 number, since 2×77925630931² (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 (77925630941) 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, 583846 + ... + 704788.

It is an arithmetic number, because the mean of its divisors is an integer number (5211718848).

Almost surely, 2^77925630931 is an apocalyptic number.

77925630931 is a deficient number, since it is larger than the sum of its proper divisors (5461870637).

77925630931 is a wasteful number, since it uses less digits than its factorization.

77925630931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121362.

The product of its (nonzero) digits is 2143260, while the sum is 52.

The spelling of 77925630931 in words is "seventy-seven billion, nine hundred twenty-five million, six hundred thirty thousand, nine hundred thirty-one".