77777599964 has 12 divisors (see below), whose sum is σ = 136114035288. Its totient is φ = 38887875600.

The previous prime is 77777599961. The next prime is 77777599979. The reversal of 77777599964 is 46999577777.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77777599961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20447 + ... + 394934.

It is an arithmetic number, because the mean of its divisors is an integer number (11342836274).

Almost surely, 2^77777599964 is an apocalyptic number.

It is an amenable number.

77777599964 is a deficient number, since it is larger than the sum of its proper divisors (58336435324).

77777599964 is a wasteful number, since it uses less digits than its factorization.

77777599964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462196 (or 462194 counting only the distinct ones).

The product of its digits is 1470276360, while the sum is 77.

The spelling of 77777599964 in words is "seventy-seven billion, seven hundred seventy-seven million, five hundred ninety-nine thousand, nine hundred sixty-four".