12657615257 has 8 divisors (see below), whose sum is σ = 14527933056. Its totient is φ = 10802819232.

The previous prime is 12657615253. The next prime is 12657615259. The reversal of 12657615257 is 75251675621.

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

It is a cyclic number.

It is not a de Polignac number, because 12657615257 - 2² = 12657615253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12657615253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3878693 + ... + 3881954.

It is an arithmetic number, because the mean of its divisors is an integer number (1815991632).

Almost surely, 2^12657615257 is an apocalyptic number.

It is an amenable number.

12657615257 is a deficient number, since it is larger than the sum of its proper divisors (1870317799).

12657615257 is an equidigital number, since it uses as much as digits as its factorization.

12657615257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7760887.

The product of its digits is 882000, while the sum is 47.

The spelling of 12657615257 in words is "twelve billion, six hundred fifty-seven million, six hundred fifteen thousand, two hundred fifty-seven".