79562181857 has 4 divisors (see below), whose sum is σ = 81412465200. Its totient is φ = 77711898516.

The previous prime is 79562181847. The next prime is 79562181887. The reversal of 79562181857 is 75818126597.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75818126597 = 128837 ⋅588481.

It is a cyclic number.

It is not a de Polignac number, because 79562181857 - 2⁶ = 79562181793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79562181796 and 79562181805.

It is not an unprimeable number, because it can be changed into a prime (79562181847) 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, 925141607 + ... + 925141692.

It is an arithmetic number, because the mean of its divisors is an integer number (20353116300).

Almost surely, 2^79562181857 is an apocalyptic number.

It is an amenable number.

79562181857 is a deficient number, since it is larger than the sum of its proper divisors (1850283343).

79562181857 is a wasteful number, since it uses less digits than its factorization.

79562181857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850283342.

The product of its digits is 8467200, while the sum is 59.

The spelling of 79562181857 in words is "seventy-nine billion, five hundred sixty-two million, one hundred eighty-one thousand, eight hundred fifty-seven".