12477952557 has 108 divisors (see below), whose sum is σ = 22381386300. Its totient is φ = 6930935424.

The previous prime is 12477952541. The next prime is 12477952559. The reversal of 12477952557 is 75525977421.

12477952557 is a `hidden beast` number, since 1 + 2 + 47 + 79 + 525 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11242148841 + 1235803716 = 106029^2 + 35154^2 .

It is not a de Polignac number, because 12477952557 - 2⁴ = 12477952541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12477952559) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 11894569 + ... + 11895617.

Almost surely, 2^12477952557 is an apocalyptic number.

It is an amenable number.

12477952557 is a deficient number, since it is larger than the sum of its proper divisors (9903433743).

12477952557 is an frugal number, since it uses more digits than its factorization.

12477952557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124 (or 1096 counting only the distinct ones).

The product of its digits is 6174000, while the sum is 54.

The spelling of 12477952557 in words is "twelve billion, four hundred seventy-seven million, nine hundred fifty-two thousand, five hundred fifty-seven".