79907766336 has 84 divisors (see below), whose sum is σ = 229823380332. Its totient is φ = 26544958464.

The previous prime is 79907766317. The next prime is 79907766349. The reversal of 79907766336 is 63366770997.

It can be written as a sum of positive squares in 2 ways, for example, as 31883673600 + 48024092736 = 178560^2 + 219144^2 .

It is a super-2 number, since 2×79907766336² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67971 + ... + 405506.

It is an arithmetic number, because the mean of its divisors is an integer number (2735992623).

Almost surely, 2^79907766336 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 79907766336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114911690166).

79907766336 is an abundant number, since it is smaller than the sum of its proper divisors (149915613996).

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

79907766336 is a wasteful number, since it uses less digits than its factorization.

79907766336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473788 (or 473775 counting only the distinct ones).

The product of its (nonzero) digits is 54010152, while the sum is 63.

The spelling of 79907766336 in words is "seventy-nine billion, nine hundred seven million, seven hundred sixty-six thousand, three hundred thirty-six".