172061510725 has 12 divisors (see below), whose sum is σ = 229768294756. Its totient is φ = 127060807680.

The previous prime is 172061510713. The next prime is 172061510749. The reversal of 172061510725 is 527015160271.

It can be written as a sum of positive squares in 6 ways, for example, as 59591156769 + 112470353956 = 244113^2 + 335366^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172061510725 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264709692 + ... + 264710341.

Almost surely, 2^172061510725 is an apocalyptic number.

It is an amenable number.

172061510725 is a deficient number, since it is larger than the sum of its proper divisors (57706784031).

172061510725 is a wasteful number, since it uses less digits than its factorization.

172061510725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529420056 (or 529420051 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 37.

Adding to 172061510725 its reverse (527015160271), we get a palindrome (699076670996).

The spelling of 172061510725 in words is "one hundred seventy-two billion, sixty-one million, five hundred ten thousand, seven hundred twenty-five".