125171161621518 has 16 divisors (see below), whose sum is σ = 250434394744320. Its totient is φ = 41708375290296.

The previous prime is 125171161621481. The next prime is 125171161621537. The reversal of 125171161621518 is 815126161171521.

125171161621518 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3836294880 + ... + 3836327507.

It is an arithmetic number, because the mean of its divisors is an integer number (15652149671520).

Almost surely, 2^{125171161621518} is an apocalyptic number.

125171161621518 is an abundant number, since it is smaller than the sum of its proper divisors (125263233122802).

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

125171161621518 is a wasteful number, since it uses less digits than its factorization.

125171161621518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672625111.

The product of its digits is 201600, while the sum is 48.

The spelling of 125171161621518 in words is "one hundred twenty-five trillion, one hundred seventy-one billion, one hundred sixty-one million, six hundred twenty-one thousand, five hundred eighteen".