12657787755731 has 4 divisors (see below), whose sum is σ = 12692277640992. Its totient is φ = 12623297870472.

The previous prime is 12657787755709. The next prime is 12657787755733. The reversal of 12657787755731 is 13755778775621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12657787755731 - 2²⁶ = 12657720646867 is a prime.

It is a super-2 number, since 2×12657787755731² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12657787755733) 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, 17244942080 + ... + 17244942813.

It is an arithmetic number, because the mean of its divisors is an integer number (3173069410248).

Almost surely, 2^{12657787755731} is an apocalyptic number.

12657787755731 is a deficient number, since it is larger than the sum of its proper divisors (34489885261).

12657787755731 is an equidigital number, since it uses as much as digits as its factorization.

12657787755731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34489885260.

The product of its digits is 605052000, while the sum is 71.

The spelling of 12657787755731 in words is "twelve trillion, six hundred fifty-seven billion, seven hundred eighty-seven million, seven hundred fifty-five thousand, seven hundred thirty-one".