12877282557 has 20 divisors (see below), whose sum is σ = 19242453340. Its totient is φ = 8582169024.

The previous prime is 12877282511. The next prime is 12877282609. The reversal of 12877282557 is 75528277821.

It is a happy number.

12877282557 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 7 + 2 + 82 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7544485881 + 5332796676 = 86859^2 + 73026^2 .

It is not a de Polignac number, because 12877282557 - 2¹¹ = 12877280509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12877282157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 254919 + ... + 301227.

It is an arithmetic number, because the mean of its divisors is an integer number (962122667).

Almost surely, 2^12877282557 is an apocalyptic number.

It is an amenable number.

12877282557 is a deficient number, since it is larger than the sum of its proper divisors (6365170783).

12877282557 is an equidigital number, since it uses as much as digits as its factorization.

12877282557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49754 (or 49745 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 54.

The spelling of 12877282557 in words is "twelve billion, eight hundred seventy-seven million, two hundred eighty-two thousand, five hundred fifty-seven".