79544972520 has 192 divisors, whose sum is σ = 279809712000. Its totient is φ = 19481679360.

The previous prime is 79544972497. The next prime is 79544972537. The reversal of 79544972520 is 2527944597.

79544972520 is a `hidden beast` number, since 7 + 9 + 5 + 4 + 49 + 72 + 520 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 888615 + ... + 974025.

It is an arithmetic number, because the mean of its divisors is an integer number (1457342250).

Almost surely, 2^79544972520 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 79544972520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139904856000).

79544972520 is an abundant number, since it is smaller than the sum of its proper divisors (200264739480).

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

79544972520 is a wasteful number, since it uses less digits than its factorization.

79544972520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85640 (or 85633 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 79544972520 in words is "seventy-nine billion, five hundred forty-four million, nine hundred seventy-two thousand, five hundred twenty".