79856965896 has 32 divisors (see below), whose sum is σ = 199663738560. Its totient is φ = 26616145472.

The previous prime is 79856965849. The next prime is 79856965897. The reversal of 79856965896 is 69856965897.

It is a super-2 number, since 2×79856965896² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79856965897) 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, 58066 + ... + 403838.

It is an arithmetic number, because the mean of its divisors is an integer number (6239491830).

Almost surely, 2^79856965896 is an apocalyptic number.

It is an amenable number.

79856965896 is an abundant number, since it is smaller than the sum of its proper divisors (119806772664).

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

79856965896 is a wasteful number, since it uses less digits than its factorization.

79856965896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355405 (or 355401 counting only the distinct ones).

The product of its digits is 1763596800, while the sum is 78.

Subtracting from 79856965896 its reverse (69856965897), we obtain a palindrome (9999999999).

The spelling of 79856965896 in words is "seventy-nine billion, eight hundred fifty-six million, nine hundred sixty-five thousand, eight hundred ninety-six".