372861849356161 has 9 divisors (see below), whose sum is σ = 409840117474179. Its totient is φ = 338965124500200.

The previous prime is 372861849356149. The next prime is 372861849356167. The reversal of 372861849356161 is 161653948168273.

The square root of 372861849356161 is 19309631.

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

It can be written as a sum of positive squares in only one way, i.e., 4320914699761 + 368540934656400 = 2078681^2 + 19197420^2 .

It is not a de Polignac number, because 372861849356161 - 2²⁷ = 372861715138433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (372861849356167) 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, 211528231 + ... + 213283651.

Almost surely, 2^{372861849356161} is an apocalyptic number.

372861849356161 is the 19309631-st square number.

372861849356161 is the 9654816-th centered octagonal number.

It is an amenable number.

372861849356161 is a deficient number, since it is larger than the sum of its proper divisors (36978268118018).

372861849356161 is an frugal number, since it uses more digits than its factorization.

372861849356161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510864 (or 1755432 counting only the distinct ones).

The product of its digits is 313528320, while the sum is 70.

The spelling of 372861849356161 in words is "three hundred seventy-two trillion, eight hundred sixty-one billion, eight hundred forty-nine million, three hundred fifty-six thousand, one hundred sixty-one".