12916237657 has 4 divisors (see below), whose sum is σ = 12930800256. Its totient is φ = 12901675060.

The previous prime is 12916237651. The next prime is 12916237681. The reversal of 12916237657 is 75673261921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12916237657 - 2¹¹ = 12916235609 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12916237657.

It is not an unprimeable number, because it can be changed into a prime (12916237651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7279969 + ... + 7281742.

It is an arithmetic number, because the mean of its divisors is an integer number (3232700064).

Almost surely, 2^12916237657 is an apocalyptic number.

It is an amenable number.

12916237657 is a deficient number, since it is larger than the sum of its proper divisors (14562599).

12916237657 is an equidigital number, since it uses as much as digits as its factorization.

12916237657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14562598.

The product of its digits is 952560, while the sum is 49.

The spelling of 12916237657 in words is "twelve billion, nine hundred sixteen million, two hundred thirty-seven thousand, six hundred fifty-seven".