12579423165 has 24 divisors (see below), whose sum is σ = 21856158168. Its totient is φ = 6693079680.

The previous prime is 12579423163. The next prime is 12579423179. The reversal of 12579423165 is 56132497521.

12579423165 is a `hidden beast` number, since 1 + 2 + 579 + 42 + 31 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13461561 + 12565961604 = 3669^2 + 112098^2 .

It is not a de Polignac number, because 12579423165 - 2¹ = 12579423163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12579423165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12579423163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313054 + ... + 350943.

It is an arithmetic number, because the mean of its divisors is an integer number (910673257).

Almost surely, 2^12579423165 is an apocalyptic number.

12579423165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12579423165 is a deficient number, since it is larger than the sum of its proper divisors (9276735003).

12579423165 is a wasteful number, since it uses less digits than its factorization.

12579423165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664429 (or 664426 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 12579423165 in words is "twelve billion, five hundred seventy-nine million, four hundred twenty-three thousand, one hundred sixty-five".