78790572894 has 64 divisors (see below), whose sum is σ = 182382036480. Its totient is φ = 22426629120.

The previous prime is 78790572871. The next prime is 78790572989. The reversal of 78790572894 is 49827509787.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494562 + ... + 634170.

It is an arithmetic number, because the mean of its divisors is an integer number (2849719320).

Almost surely, 2^78790572894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78790572894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91191018240).

78790572894 is an abundant number, since it is smaller than the sum of its proper divisors (103591463586).

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

78790572894 is a wasteful number, since it uses less digits than its factorization.

78790572894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140145.

The product of its (nonzero) digits is 71124480, while the sum is 66.

The spelling of 78790572894 in words is "seventy-eight billion, seven hundred ninety million, five hundred seventy-two thousand, eight hundred ninety-four".