12959857091 has 2 divisors, whose sum is σ = 12959857092. Its totient is φ = 12959857090.

The previous prime is 12959856991. The next prime is 12959857139. The reversal of 12959857091 is 19075895921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12959857091 is a prime.

It is not a weakly prime, because it can be changed into another prime (12959857291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6479928545 + 6479928546.

It is an arithmetic number, because the mean of its divisors is an integer number (6479928546).

Almost surely, 2^12959857091 is an apocalyptic number.

12959857091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12959857091 is an equidigital number, since it uses as much as digits as its factorization.

12959857091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2041200, while the sum is 56.

The spelling of 12959857091 in words is "twelve billion, nine hundred fifty-nine million, eight hundred fifty-seven thousand, ninety-one".