79561453956 has 12 divisors (see below), whose sum is σ = 185643392592. Its totient is φ = 26520484648.

The previous prime is 79561453949. The next prime is 79561453957. The reversal of 79561453956 is 65935416597.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 79561453956.

It is not an unprimeable number, because it can be changed into a prime (79561453957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3315060570 + ... + 3315060593.

It is an arithmetic number, because the mean of its divisors is an integer number (15470282716).

Almost surely, 2^79561453956 is an apocalyptic number.

It is an amenable number.

79561453956 is an abundant number, since it is smaller than the sum of its proper divisors (106081938636).

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

79561453956 is a wasteful number, since it uses less digits than its factorization.

79561453956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6630121170 (or 6630121168 counting only the distinct ones).

The product of its digits is 30618000, while the sum is 60.

The spelling of 79561453956 in words is "seventy-nine billion, five hundred sixty-one million, four hundred fifty-three thousand, nine hundred fifty-six".