79918508736 has 224 divisors, whose sum is σ = 259473557760. Its totient is φ = 24217263360.

The previous prime is 79918508711. The next prime is 79918508737. The reversal of 79918508736 is 63780581997.

79918508736 is a `hidden beast` number, since 7 + 9 + 91 + 8 + 508 + 7 + 36 = 666.

It is a super-2 number, since 2×79918508736² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79918508737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1513695 + ... + 1565601.

Almost surely, 2^79918508736 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 79918508736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129736778880).

79918508736 is an abundant number, since it is smaller than the sum of its proper divisors (179555049024).

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

79918508736 is an equidigital number, since it uses as much as digits as its factorization.

79918508736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51951 (or 51923 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 79918508736 in words is "seventy-nine billion, nine hundred eighteen million, five hundred eight thousand, seven hundred thirty-six".