125880761721 has 64 divisors (see below), whose sum is σ = 202720008960. Its totient is φ = 68457984000.

The previous prime is 125880761701. The next prime is 125880761737. The reversal of 125880761721 is 127167088521.

It is not a de Polignac number, because 125880761721 - 2²⁵ = 125847207289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125880761701) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4929775 + ... + 4955243.

It is an arithmetic number, because the mean of its divisors is an integer number (3167500140).

Almost surely, 2^125880761721 is an apocalyptic number.

125880761721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

125880761721 is a deficient number, since it is larger than the sum of its proper divisors (76839247239).

125880761721 is a wasteful number, since it uses less digits than its factorization.

125880761721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25818.

The product of its (nonzero) digits is 376320, while the sum is 48.

The spelling of 125880761721 in words is "one hundred twenty-five billion, eight hundred eighty million, seven hundred sixty-one thousand, seven hundred twenty-one".