79960839957 has 64 divisors (see below), whose sum is σ = 131028917760. Its totient is φ = 47936351232.

The previous prime is 79960839953. The next prime is 79960839967. The reversal of 79960839957 is 75993806997.

It is a happy number.

79960839957 is a `hidden beast` number, since 7 + 9 + 9 + 608 + 3 + 9 + 9 + 5 + 7 = 666.

It is not a de Polignac number, because 79960839957 - 2² = 79960839953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79960839953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10690503 + ... + 10697979.

It is an arithmetic number, because the mean of its divisors is an integer number (2047326840).

Almost surely, 2^79960839957 is an apocalyptic number.

It is an amenable number.

79960839957 is a deficient number, since it is larger than the sum of its proper divisors (51068077803).

79960839957 is a wasteful number, since it uses less digits than its factorization.

79960839957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8539 (or 8533 counting only the distinct ones).

The product of its (nonzero) digits is 231472080, while the sum is 72.

The spelling of 79960839957 in words is "seventy-nine billion, nine hundred sixty million, eight hundred thirty-nine thousand, nine hundred fifty-seven".