79857675897 has 4 divisors (see below), whose sum is σ = 106476901200. Its totient is φ = 53238450596.

The previous prime is 79857675857. The next prime is 79857675907.

79857675897 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79857675897 - 2²⁷ = 79723458169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79857675817) 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, 13309612647 + ... + 13309612652.

It is an arithmetic number, because the mean of its divisors is an integer number (26619225300).

Almost surely, 2^79857675897 is an apocalyptic number.

It is an amenable number.

79857675897 is a deficient number, since it is larger than the sum of its proper divisors (26619225303).

79857675897 is a wasteful number, since it uses less digits than its factorization.

79857675897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26619225302.

The product of its digits is 1867017600, while the sum is 78.

The spelling of 79857675897 in words is "seventy-nine billion, eight hundred fifty-seven million, six hundred seventy-five thousand, eight hundred ninety-seven".