325172534916681 has 9 divisors (see below), whose sum is σ = 469693739687341. Its totient is φ = 216781653879372.

The previous prime is 325172534916667. The next prime is 325172534916709. The reversal of 325172534916681 is 186619435271523.

The square root of 325172534916681 is 18032541.

It is a perfect power (a square), and thus also a powerful number.

325172534916681 is a `hidden beast` number, since 3 + 2 + 5 + 1 + 7 + 2 + 5 + 3 + 491 + 66 + 81 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 325172534916681 - 2³⁷ = 325035095963209 is a prime.

It is a super-2 number, since 2×325172534916681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (325172534916881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 51092200 + ... + 57103046.

Almost surely, 2^{325172534916681} is an apocalyptic number.

325172534916681 is the 18032541-st square number.

325172534916681 is the 9016271-st centered octagonal number.

It is an amenable number.

325172534916681 is a deficient number, since it is larger than the sum of its proper divisors (144521204770660).

325172534916681 is an frugal number, since it uses more digits than its factorization.

325172534916681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12021700 (or 6010850 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 63.

The spelling of 325172534916681 in words is "three hundred twenty-five trillion, one hundred seventy-two billion, five hundred thirty-four million, nine hundred sixteen thousand, six hundred eighty-one".