79902056891506 has 16 divisors (see below), whose sum is σ = 126905065929216. Its totient is φ = 37600434881856.

The previous prime is 79902056891497. The next prime is 79902056891507. The reversal of 79902056891506 is 60519865020997.

It is a super-2 number, since 2×79902056891506² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79902056891507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14219646 + ... + 19026361.

It is an arithmetic number, because the mean of its divisors is an integer number (7931566620576).

Almost surely, 2^{79902056891506} is an apocalyptic number.

79902056891506 is a deficient number, since it is larger than the sum of its proper divisors (47003009037710).

79902056891506 is a wasteful number, since it uses less digits than its factorization.

79902056891506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33316713.

The product of its (nonzero) digits is 73483200, while the sum is 67.

The spelling of 79902056891506 in words is "seventy-nine trillion, nine hundred two billion, fifty-six million, eight hundred ninety-one thousand, five hundred six".