125697728664 has 32 divisors (see below), whose sum is σ = 349160358000. Its totient is φ = 41899242816.

The previous prime is 125697728627. The next prime is 125697728669. The reversal of 125697728664 is 466827796521.

125697728664 is a `hidden beast` number, since 1 + 2 + 569 + 7 + 7 + 2 + 8 + 6 + 64 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125697728669) 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, 290966749 + ... + 290967180.

Almost surely, 2^125697728664 is an apocalyptic number.

It is an amenable number.

125697728664 is an abundant number, since it is smaller than the sum of its proper divisors (223462629336).

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

125697728664 is a wasteful number, since it uses less digits than its factorization.

125697728664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581933944 (or 581933934 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 125697728664 in words is "one hundred twenty-five billion, six hundred ninety-seven million, seven hundred twenty-eight thousand, six hundred sixty-four".