77964788562 has 48 divisors (see below), whose sum is σ = 157435414752. Its totient is φ = 25739398080.

The previous prime is 77964788533. The next prime is 77964788563. The reversal of 77964788562 is 26588746977.

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 23 ways as a sum of consecutive naturals, for example, 59018862 + ... + 59020182.

It is an arithmetic number, because the mean of its divisors is an integer number (3279904474).

Almost surely, 2^77964788562 is an apocalyptic number.

77964788562 is an abundant number, since it is smaller than the sum of its proper divisors (79470626190).

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

77964788562 is a wasteful number, since it uses less digits than its factorization.

77964788562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991 (or 1812 counting only the distinct ones).

The product of its digits is 284497920, while the sum is 69.

The spelling of 77964788562 in words is "seventy-seven billion, nine hundred sixty-four million, seven hundred eighty-eight thousand, five hundred sixty-two".