12777637625 has 8 divisors (see below), whose sum is σ = 15946491912. Its totient is φ = 10222110000.

The previous prime is 12777637619. The next prime is 12777637627. The reversal of 12777637625 is 52673677721.

It can be written as a sum of positive squares in 4 ways, for example, as 841638121 + 11935999504 = 29011^2 + 109252^2 .

It is not a de Polignac number, because 12777637625 - 2¹² = 12777633529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12777637627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51110426 + ... + 51110675.

It is an arithmetic number, because the mean of its divisors is an integer number (1993311489).

Almost surely, 2^12777637625 is an apocalyptic number.

It is an amenable number.

12777637625 is a deficient number, since it is larger than the sum of its proper divisors (3168854287).

12777637625 is an equidigital number, since it uses as much as digits as its factorization.

12777637625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102221116 (or 102221106 counting only the distinct ones).

The product of its digits is 5186160, while the sum is 53.

The spelling of 12777637625 in words is "twelve billion, seven hundred seventy-seven million, six hundred thirty-seven thousand, six hundred twenty-five".