63131388125 has 20 divisors (see below), whose sum is σ = 84957376812. Its totient is φ = 46620096000.

The previous prime is 63131388097. The next prime is 63131388167. The reversal of 63131388125 is 52188313136.

It can be written as a sum of positive squares in 10 ways, for example, as 44797415716 + 18333972409 = 211654^2 + 135403^2 .

It is not a de Polignac number, because 63131388125 - 2²⁰ = 63130339549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3876884 + ... + 3893133.

Almost surely, 2^63131388125 is an apocalyptic number.

63131388125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63131388125 is a deficient number, since it is larger than the sum of its proper divisors (21825988687).

63131388125 is an equidigital number, since it uses as much as digits as its factorization.

63131388125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770050 (or 7770035 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The spelling of 63131388125 in words is "sixty-three billion, one hundred thirty-one million, three hundred eighty-eight thousand, one hundred twenty-five".