252637922161 has 3 divisors (see below), whose sum is σ = 252638424793. Its totient is φ = 252637419530.

The previous prime is 252637922149. The next prime is 252637922177. The reversal of 252637922161 is 161229736252.

The square root of 252637922161 is 502631.

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

252637922161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 252637922161 - 2⁵ = 252637922129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252637925161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 251316 + ... + 753946.

Almost surely, 2^252637922161 is an apocalyptic number.

252637922161 is the 502631-st square number.

252637922161 is the 251316-th centered octagonal number.

It is an amenable number.

252637922161 is a deficient number, since it is larger than the sum of its proper divisors (502632).

252637922161 is an frugal number, since it uses more digits than its factorization.

252637922161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005262 (or 502631 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The spelling of 252637922161 in words is "two hundred fifty-two billion, six hundred thirty-seven million, nine hundred twenty-two thousand, one hundred sixty-one".