79981056 has 120 divisors (see below), whose sum is σ = 244648404. Its totient is φ = 25067520.

The previous prime is 79981021. The next prime is 79981079. The reversal of 79981056 is 65018997.

It can be written as a sum of positive squares in 2 ways, for example, as 77158656 + 2822400 = 8784^2 + 1680^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77826 + ... + 78846.

Almost surely, 2^79981056 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 79981056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122324202).

79981056 is an abundant number, since it is smaller than the sum of its proper divisors (164667348).

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

79981056 is a wasteful number, since it uses less digits than its factorization.

79981056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062 (or 1043 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 79981056 is about 8943.2128455047. The cubic root of 79981056 is about 430.8529239791.

The spelling of 79981056 in words is "seventy-nine million, nine hundred eighty-one thousand, fifty-six".