12506736657 has 16 divisors (see below), whose sum is σ = 17403914880. Its totient is φ = 7973826432.

The previous prime is 12506736629. The next prime is 12506736667. The reversal of 12506736657 is 75663760521.

It is not a de Polignac number, because 12506736657 - 2¹² = 12506732561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12506736617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449413 + ... + 476429.

It is an arithmetic number, because the mean of its divisors is an integer number (1087744680).

Almost surely, 2^12506736657 is an apocalyptic number.

It is an amenable number.

12506736657 is a deficient number, since it is larger than the sum of its proper divisors (4897178223).

12506736657 is a wasteful number, since it uses less digits than its factorization.

12506736657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33752.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 12506736657 in words is "twelve billion, five hundred six million, seven hundred thirty-six thousand, six hundred fifty-seven".