12149979907957 has 2 divisors, whose sum is σ = 12149979907958. Its totient is φ = 12149979907956.

The previous prime is 12149979907907. The next prime is 12149979907981. The reversal of 12149979907957 is 75970997994121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6870825743076 + 5279154164881 = 2621226^2 + 2297641^2 .

It is a cyclic number.

It is not a de Polignac number, because 12149979907957 - 2²³ = 12149971519349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12149979907907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6074989953978 + 6074989953979.

It is an arithmetic number, because the mean of its divisors is an integer number (6074989953979).

Almost surely, 2^{12149979907957} is an apocalyptic number.

It is an amenable number.

12149979907957 is a deficient number, since it is larger than the sum of its proper divisors (1).

12149979907957 is an equidigital number, since it uses as much as digits as its factorization.

12149979907957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810152280, while the sum is 79.

The spelling of 12149979907957 in words is "twelve trillion, one hundred forty-nine billion, nine hundred seventy-nine million, nine hundred seven thousand, nine hundred fifty-seven".