12956073381 has 24 divisors (see below), whose sum is σ = 20334762240. Its totient is φ = 7918819200.

The previous prime is 12956073359. The next prime is 12956073407. The reversal of 12956073381 is 18337065921.

12956073381 is a `hidden beast` number, since 1 + 2 + 9 + 5 + 607 + 3 + 38 + 1 = 666.

It is not a de Polignac number, because 12956073381 - 2²² = 12951879077 is a prime.

It is a super-2 number, since 2×12956073381² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12956073311) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1216740 + ... + 1227341.

It is an arithmetic number, because the mean of its divisors is an integer number (847281760).

Almost surely, 2^12956073381 is an apocalyptic number.

It is an amenable number.

12956073381 is a deficient number, since it is larger than the sum of its proper divisors (7378688859).

12956073381 is a wasteful number, since it uses less digits than its factorization.

12956073381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444137 (or 2444134 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 12956073381 in words is "twelve billion, nine hundred fifty-six million, seventy-three thousand, three hundred eighty-one".