79136129201620 has 24 divisors (see below), whose sum is σ = 166186038428424. Its totient is φ = 31654419851136.

The previous prime is 79136129201603. The next prime is 79136129201641. The reversal of 79136129201620 is 2610292163197.

It can be written as a sum of positive squares in 4 ways, for example, as 17884813153936 + 61251316047684 = 4229044^2 + 7826322^2 .

It is a super-2 number, since 2×79136129201620² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

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, 38254882 + ... + 40270438.

It is an arithmetic number, because the mean of its divisors is an integer number (6924418267851).

Almost surely, 2^{79136129201620} is an apocalyptic number.

It is an amenable number.

79136129201620 is an abundant number, since it is smaller than the sum of its proper divisors (87049909226804).

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

79136129201620 is a wasteful number, since it uses less digits than its factorization.

79136129201620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3978699 (or 3978697 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 79136129201620 in words is "seventy-nine trillion, one hundred thirty-six billion, one hundred twenty-nine million, two hundred one thousand, six hundred twenty".