12857771952 has 80 divisors (see below), whose sum is σ = 37691873280. Its totient is φ = 4194727488.

The previous prime is 12857771929. The next prime is 12857772019. The reversal of 12857771952 is 25917775821.

12857771952 is a `hidden beast` number, since 1 + 2 + 8 + 577 + 7 + 19 + 52 = 666.

12857771952 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296328 + ... + 336935.

It is an arithmetic number, because the mean of its divisors is an integer number (471148416).

Almost surely, 2^12857771952 is an apocalyptic number.

12857771952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12857771952 is an abundant number, since it is smaller than the sum of its proper divisors (24834101328).

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

12857771952 is a wasteful number, since it uses less digits than its factorization.

12857771952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633327 (or 633315 counting only the distinct ones).

The product of its digits is 2469600, while the sum is 54.

The spelling of 12857771952 in words is "twelve billion, eight hundred fifty-seven million, seven hundred seventy-one thousand, nine hundred fifty-two".