77990288032 has 48 divisors (see below), whose sum is σ = 156177504000. Its totient is φ = 38327120640.

The previous prime is 77990288021. The next prime is 77990288059. The reversal of 77990288032 is 23088209977.

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, 2716569 + ... + 2745127.

It is an arithmetic number, because the mean of its divisors is an integer number (3253698000).

Almost surely, 2^77990288032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77990288032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78088752000).

77990288032 is an abundant number, since it is smaller than the sum of its proper divisors (78187215968).

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

77990288032 is a wasteful number, since it uses less digits than its factorization.

77990288032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029 (or 30021 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 77990288032 in words is "seventy-seven billion, nine hundred ninety million, two hundred eighty-eight thousand, thirty-two".