12912685957 has 8 divisors (see below), whose sum is σ = 13540938840. Its totient is φ = 12296632320.

The previous prime is 12912685943. The next prime is 12912685963. The reversal of 12912685957 is 75958621921.

12912685957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 113634²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 109537156 + 12803148801 = 10466^2 + 113151^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12912685957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12912685898 and 12912685907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12912685927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3047644 + ... + 3051877.

It is an arithmetic number, because the mean of its divisors is an integer number (1692617355).

Almost surely, 2^12912685957 is an apocalyptic number.

It is an amenable number.

12912685957 is a deficient number, since it is larger than the sum of its proper divisors (628252883).

12912685957 is an equidigital number, since it uses as much as digits as its factorization.

12912685957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099623.

The product of its digits is 2721600, while the sum is 55.

The spelling of 12912685957 in words is "twelve billion, nine hundred twelve million, six hundred eighty-five thousand, nine hundred fifty-seven".