125137637640 has 64 divisors (see below), whose sum is σ = 417125462400. Its totient is φ = 33370036416.

The previous prime is 125137637609. The next prime is 125137637693. The reversal of 125137637640 is 46736731521.

125137637640 is a `hidden beast` number, since 1 + 2 + 5 + 1 + 3 + 7 + 637 + 6 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57933012 + ... + 57935171.

It is an arithmetic number, because the mean of its divisors is an integer number (6517585350).

Almost surely, 2^125137637640 is an apocalyptic number.

125137637640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125137637640 is an abundant number, since it is smaller than the sum of its proper divisors (291987824760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125137637640 is a wasteful number, since it uses less digits than its factorization.

125137637640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115868203 (or 115868193 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 125137637640 in words is "one hundred twenty-five billion, one hundred thirty-seven million, six hundred thirty-seven thousand, six hundred forty".