12856373291 has 2 divisors, whose sum is σ = 12856373292. Its totient is φ = 12856373290.

The previous prime is 12856373261. The next prime is 12856373303. The reversal of 12856373291 is 19237365821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12856373291 - 2¹⁴ = 12856356907 is a prime.

It is not a weakly prime, because it can be changed into another prime (12856373261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6428186645 + 6428186646.

It is an arithmetic number, because the mean of its divisors is an integer number (6428186646).

Almost surely, 2^12856373291 is an apocalyptic number.

12856373291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12856373291 is an equidigital number, since it uses as much as digits as its factorization.

12856373291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The spelling of 12856373291 in words is "twelve billion, eight hundred fifty-six million, three hundred seventy-three thousand, two hundred ninety-one".