12877752521 has 2 divisors, whose sum is σ = 12877752522. Its totient is φ = 12877752520.

The previous prime is 12877752409. The next prime is 12877752527. The reversal of 12877752521 is 12525777821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11698585600 + 1179166921 = 108160^2 + 34339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12877752521 is a prime.

It is not a weakly prime, because it can be changed into another prime (12877752527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6438876260 + 6438876261.

It is an arithmetic number, because the mean of its divisors is an integer number (6438876261).

Almost surely, 2^12877752521 is an apocalyptic number.

It is an amenable number.

12877752521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12877752521 is an equidigital number, since it uses as much as digits as its factorization.

12877752521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 548800, while the sum is 47.

The spelling of 12877752521 in words is "twelve billion, eight hundred seventy-seven million, seven hundred fifty-two thousand, five hundred twenty-one".