13187177425 has 6 divisors (see below), whose sum is σ = 16352100038. Its totient is φ = 10549741920.

The previous prime is 13187177387. The next prime is 13187177429. The reversal of 13187177425 is 52477178131.

It can be written as a sum of positive squares in 3 ways, for example, as 83338641 + 13103838784 = 9129^2 + 114472^2 .

It is not a de Polignac number, because 13187177425 - 2¹⁵ = 13187144657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13187177429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263743524 + ... + 263743573.

Almost surely, 2^13187177425 is an apocalyptic number.

It is an amenable number.

13187177425 is a deficient number, since it is larger than the sum of its proper divisors (3164922613).

13187177425 is an equidigital number, since it uses as much as digits as its factorization.

13187177425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527487107 (or 527487102 counting only the distinct ones).

The product of its digits is 329280, while the sum is 46.

The spelling of 13187177425 in words is "thirteen billion, one hundred eighty-seven million, one hundred seventy-seven thousand, four hundred twenty-five".