12677511423521 has 12 divisors (see below), whose sum is σ = 14747718464388. Its totient is φ = 10866136804992.

The previous prime is 12677511423487. The next prime is 12677511423539. The reversal of 12677511423521 is 12532411577621.

It can be written as a sum of positive squares in 2 ways, for example, as 7140733006225 + 5536778417296 = 2672215^2 + 2353036^2 .

It is not a de Polignac number, because 12677511423521 - 2²² = 12677507229217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12677511423221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1797236 + ... + 5346501.

It is an arithmetic number, because the mean of its divisors is an integer number (1228976538699).

Almost surely, 2^{12677511423521} is an apocalyptic number.

It is an amenable number.

12677511423521 is a deficient number, since it is larger than the sum of its proper divisors (2070207040867).

12677511423521 is an equidigital number, since it uses as much as digits as its factorization.

12677511423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7179968 (or 7179961 counting only the distinct ones).

The product of its digits is 705600, while the sum is 47.

The spelling of 12677511423521 in words is "twelve trillion, six hundred seventy-seven billion, five hundred eleven million, four hundred twenty-three thousand, five hundred twenty-one".