12956393090 has 24 divisors (see below), whose sum is σ = 24774063732. Its totient is φ = 4877699840.

The previous prime is 12956393089. The next prime is 12956393123. The reversal of 12956393090 is 9039365921.

It can be written as a sum of positive squares in 6 ways, for example, as 6292772929 + 6663620161 = 79327^2 + 81631^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2238701 + ... + 2244480.

Almost surely, 2^12956393090 is an apocalyptic number.

12956393090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12956393090 is a deficient number, since it is larger than the sum of its proper divisors (11817670642).

12956393090 is a wasteful number, since it uses less digits than its factorization.

12956393090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483222 (or 4483205 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 47.

The spelling of 12956393090 in words is "twelve billion, nine hundred fifty-six million, three hundred ninety-three thousand, ninety".