77493618864 has 50 divisors (see below), whose sum is σ = 224289019460. Its totient is φ = 25831205856.

The previous prime is 77493618833. The next prime is 77493618877. The reversal of 77493618864 is 46881639477.

77493618864 is a `hidden beast` number, since 7 + 7 + 4 + 9 + 3 + 618 + 8 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 29895934 + ... + 29898525.

Almost surely, 2^77493618864 is an apocalyptic number.

It is an amenable number.

77493618864 is an abundant number, since it is smaller than the sum of its proper divisors (146795400596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77493618864 is a wasteful number, since it uses less digits than its factorization.

77493618864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59794479 (or 59794464 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 77493618864 in words is "seventy-seven billion, four hundred ninety-three million, six hundred eighteen thousand, eight hundred sixty-four".