79581777504 has 48 divisors (see below), whose sum is σ = 208989849600. Its totient is φ = 26516124800.

The previous prime is 79581777449. The next prime is 79581777529. The reversal of 79581777504 is 40577718597.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57529 + ... + 403079.

It is an arithmetic number, because the mean of its divisors is an integer number (4353955200).

Almost surely, 2^79581777504 is an apocalyptic number.

It is an amenable number.

79581777504 is an abundant number, since it is smaller than the sum of its proper divisors (129408072096).

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

79581777504 is a wasteful number, since it uses less digits than its factorization.

79581777504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347963 (or 347955 counting only the distinct ones).

The product of its (nonzero) digits is 17287200, while the sum is 60.

The spelling of 79581777504 in words is "seventy-nine billion, five hundred eighty-one million, seven hundred seventy-seven thousand, five hundred four".