979217556520 has 32 divisors (see below), whose sum is σ = 2517988003200. Its totient is φ = 335731733568.

The previous prime is 979217556391. The next prime is 979217556539. The reversal of 979217556520 is 25655712979.

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, 1748602500 + ... + 1748603059.

It is an arithmetic number, because the mean of its divisors is an integer number (78687125100).

Almost surely, 2^979217556520 is an apocalyptic number.

It is an amenable number.

979217556520 is an abundant number, since it is smaller than the sum of its proper divisors (1538770446680).

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

979217556520 is a wasteful number, since it uses less digits than its factorization.

979217556520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497205577 (or 3497205573 counting only the distinct ones).

The product of its (nonzero) digits is 11907000, while the sum is 58.

The spelling of 979217556520 in words is "nine hundred seventy-nine billion, two hundred seventeen million, five hundred fifty-six thousand, five hundred twenty".