172261372125 has 64 divisors (see below), whose sum is σ = 299289489408. Its totient is φ = 87824264000.

The previous prime is 172261372117. The next prime is 172261372237. The reversal of 172261372125 is 521273162271.

It is not a de Polignac number, because 172261372125 - 2³ = 172261372117 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16649704 + ... + 16660046.

It is an arithmetic number, because the mean of its divisors is an integer number (4676398272).

Almost surely, 2^172261372125 is an apocalyptic number.

172261372125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172261372125 is a deficient number, since it is larger than the sum of its proper divisors (127028117283).

172261372125 is a wasteful number, since it uses less digits than its factorization.

172261372125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12315 (or 12305 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The spelling of 172261372125 in words is "one hundred seventy-two billion, two hundred sixty-one million, three hundred seventy-two thousand, one hundred twenty-five".