79967521620 has 192 divisors, whose sum is σ = 301054440960. Its totient is φ = 17203083264.

The previous prime is 79967521609. The next prime is 79967521643. The reversal of 79967521620 is 2612576997.

79967521620 is a `hidden beast` number, since 7 + 9 + 9 + 6 + 7 + 5 + 2 + 1 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 557959 + ... + 686478.

It is an arithmetic number, because the mean of its divisors is an integer number (1567991880).

Almost surely, 2^79967521620 is an apocalyptic number.

79967521620 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79967521620 is an abundant number, since it is smaller than the sum of its proper divisors (221086919340).

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

79967521620 is a wasteful number, since it uses less digits than its factorization.

79967521620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244479 (or 1244471 counting only the distinct ones).

The product of its (nonzero) digits is 2857680, while the sum is 54.

The spelling of 79967521620 in words is "seventy-nine billion, nine hundred sixty-seven million, five hundred twenty-one thousand, six hundred twenty".