77186725664 has 12 divisors (see below), whose sum is σ = 151961366214. Its totient is φ = 38593362816.

The previous prime is 77186725657. The next prime is 77186725691. The reversal of 77186725664 is 46652768177.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49133155600 + 28053570064 = 221660^2 + 167492^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1206042557 + ... + 1206042620.

Almost surely, 2^77186725664 is an apocalyptic number.

It is an amenable number.

77186725664 is a deficient number, since it is larger than the sum of its proper divisors (74774640550).

77186725664 is a wasteful number, since it uses less digits than its factorization.

77186725664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412085187 (or 2412085179 counting only the distinct ones).

The product of its digits is 23708160, while the sum is 59.

The spelling of 77186725664 in words is "seventy-seven billion, one hundred eighty-six million, seven hundred twenty-five thousand, six hundred sixty-four".