79568671257 has 12 divisors (see below), whose sum is σ = 120981605680. Its totient is φ = 50253897528.

The previous prime is 79568671249. The next prime is 79568671289. The reversal of 79568671257 is 75217686597.

79568671257 is a `hidden beast` number, since 7 + 9 + 568 + 6 + 7 + 12 + 57 = 666.

It is not a de Polignac number, because 79568671257 - 2³ = 79568671249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79568671194 and 79568671203.

It is not an unprimeable number, because it can be changed into a prime (79568671297) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232656763 + ... + 232657104.

Almost surely, 2^79568671257 is an apocalyptic number.

It is an amenable number.

79568671257 is a deficient number, since it is larger than the sum of its proper divisors (41412934423).

79568671257 is a wasteful number, since it uses less digits than its factorization.

79568671257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465313892 (or 465313889 counting only the distinct ones).

The product of its digits is 44452800, while the sum is 63.

The spelling of 79568671257 in words is "seventy-nine billion, five hundred sixty-eight million, six hundred seventy-one thousand, two hundred fifty-seven".