79779623619136 has 63 divisors (see below), whose sum is σ = 184160815136739. Its totient is φ = 34191052898688.

The previous prime is 79779623619071. The next prime is 79779623619187. The reversal of 79779623619136 is 63191632697797.

The square root of 79779623619136 is 8931944.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×79779623619136² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 500109115 + ... + 500268613.

It is an arithmetic number, because the mean of its divisors is an integer number (2923187541853).

Almost surely, 2^{79779623619136} is an apocalyptic number.

79779623619136 is the 8931944-th square number.

It is an amenable number.

79779623619136 is an abundant number, since it is smaller than the sum of its proper divisors (104381191517603).

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

79779623619136 is an frugal number, since it uses more digits than its factorization.

79779623619136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319024 (or 159508 counting only the distinct ones).

The product of its digits is 972182736, while the sum is 76.

The spelling of 79779623619136 in words is "seventy-nine trillion, seven hundred seventy-nine billion, six hundred twenty-three million, six hundred nineteen thousand, one hundred thirty-six".