77964788564 has 24 divisors (see below), whose sum is σ = 146944939680. Its totient is φ = 35980981344.

The previous prime is 77964788563. The next prime is 77964788581. The reversal of 77964788564 is 46588746977.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77964788563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726647 + ... + 827009.

It is an arithmetic number, because the mean of its divisors is an integer number (6122705820).

Almost surely, 2^77964788564 is an apocalyptic number.

It is an amenable number.

77964788564 is a deficient number, since it is larger than the sum of its proper divisors (68980151116).

77964788564 is a wasteful number, since it uses less digits than its factorization.

77964788564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115319 (or 115317 counting only the distinct ones).

The product of its digits is 568995840, while the sum is 71.

The spelling of 77964788564 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, five hundred sixty-four".