77952004857 has 16 divisors (see below), whose sum is σ = 115659720000. Its totient is φ = 51889132512.

The previous prime is 77952004841. The next prime is 77952004873. The reversal of 77952004857 is 75840025977.

It is a happy number.

77952004857 is a `hidden beast` number, since 7 + 79 + 520 + 0 + 48 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (77952004841) and next prime (77952004873).

It is not a de Polignac number, because 77952004857 - 2⁴ = 77952004841 is a prime.

It is a super-2 number, since 2×77952004857² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77952004807) 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, 2172732 + ... + 2208317.

It is an arithmetic number, because the mean of its divisors is an integer number (7228732500).

Almost surely, 2^77952004857 is an apocalyptic number.

It is an amenable number.

77952004857 is a deficient number, since it is larger than the sum of its proper divisors (37707715143).

77952004857 is a wasteful number, since it uses less digits than its factorization.

77952004857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381717 (or 4381711 counting only the distinct ones).

The product of its (nonzero) digits is 4939200, while the sum is 54.

The spelling of 77952004857 in words is "seventy-seven billion, nine hundred fifty-two million, four thousand, eight hundred fifty-seven".