125680705920 has 1536 divisors, whose sum is σ = 579279052800. Its totient is φ = 25181798400.

The previous prime is 125680705919. The next prime is 125680705961. The reversal of 125680705920 is 29507086521.

125680705920 is a `hidden beast` number, since 1 + 2 + 56 + 8 + 0 + 7 + 0 + 592 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 453720822 + ... + 453721098.

It is an arithmetic number, because the mean of its divisors is an integer number (377134800).

Almost surely, 2^125680705920 is an apocalyptic number.

125680705920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125680705920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289639526400).

125680705920 is an abundant number, since it is smaller than the sum of its proper divisors (453598346880).

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

125680705920 is a wasteful number, since it uses less digits than its factorization.

125680705920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 125680705920 in words is "one hundred twenty-five billion, six hundred eighty million, seven hundred five thousand, nine hundred twenty".