79856859465 has 12 divisors (see below), whose sum is σ = 138418556484. Its totient is φ = 42590325024.

The previous prime is 79856859451. The next prime is 79856859479. The reversal of 79856859465 is 56495865897.

79856859465 is a `hidden beast` number, since 7 + 9 + 8 + 568 + 59 + 4 + 6 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (79856859451) and next prime (79856859479).

It can be written as a sum of positive squares in 2 ways, for example, as 29003452416 + 50853407049 = 170304^2 + 225507^2 .

It is not a de Polignac number, because 79856859465 - 2⁷ = 79856859337 is a prime.

It is a super-2 number, since 2×79856859465² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 79856859393 and 79856859402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 887298394 + ... + 887298483.

It is an arithmetic number, because the mean of its divisors is an integer number (11534879707).

Almost surely, 2^79856859465 is an apocalyptic number.

It is an amenable number.

79856859465 is a deficient number, since it is larger than the sum of its proper divisors (58561697019).

79856859465 is a wasteful number, since it uses less digits than its factorization.

79856859465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1774596888 (or 1774596885 counting only the distinct ones).

The product of its digits is 653184000, while the sum is 72.

The spelling of 79856859465 in words is "seventy-nine billion, eight hundred fifty-six million, eight hundred fifty-nine thousand, four hundred sixty-five".