77164622564 has 12 divisors (see below), whose sum is σ = 136375100988. Its totient is φ = 38200308000.

The previous prime is 77164622551. The next prime is 77164622603. The reversal of 77164622564 is 46522646177.

It can be written as a sum of positive squares in 2 ways, for example, as 53642265664 + 23522356900 = 231608^2 + 153370^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95500367 + ... + 95501174.

It is an arithmetic number, because the mean of its divisors is an integer number (11364591749).

Almost surely, 2^77164622564 is an apocalyptic number.

It is an amenable number.

77164622564 is a deficient number, since it is larger than the sum of its proper divisors (59210478424).

77164622564 is a wasteful number, since it uses less digits than its factorization.

77164622564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191001646 (or 191001644 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 50.

The spelling of 77164622564 in words is "seventy-seven billion, one hundred sixty-four million, six hundred twenty-two thousand, five hundred sixty-four".