12157565670 has 64 divisors (see below), whose sum is σ = 33110000640. Its totient is φ = 3173035104.

The previous prime is 12157565611. The next prime is 12157565711. The reversal of 12157565670 is 7656575121.

12157565670 is a `hidden beast` number, since 1 + 2 + 1 + 575 + 6 + 5 + 6 + 70 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 466332 + ... + 491711.

It is an arithmetic number, because the mean of its divisors is an integer number (517343760).

Almost surely, 2^12157565670 is an apocalyptic number.

12157565670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12157565670 is an abundant number, since it is smaller than the sum of its proper divisors (20952434970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12157565670 is a wasteful number, since it uses less digits than its factorization.

12157565670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958106 (or 958100 counting only the distinct ones).

The product of its (nonzero) digits is 441000, while the sum is 45.

The spelling of 12157565670 in words is "twelve billion, one hundred fifty-seven million, five hundred sixty-five thousand, six hundred seventy".