202427106561 has 15 divisors (see below), whose sum is σ = 302397158833. Its totient is φ = 134948704860.

The previous prime is 202427106529. The next prime is 202427106571. The reversal of 202427106561 is 165601724202.

It is a happy number.

The square root of 202427106561 is 449919.

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

202427106561 is a `hidden beast` number, since 2 + 0 + 24 + 2 + 71 + 0 + 6 + 561 = 666.

It is not a de Polignac number, because 202427106561 - 2⁵ = 202427106529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202427106521) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4024276 + ... + 4074266.

Almost surely, 2^202427106561 is an apocalyptic number.

202427106561 is the 449919-th square number.

202427106561 is the 224960-th centered octagonal number.

It is an amenable number.

202427106561 is a deficient number, since it is larger than the sum of its proper divisors (99970052272).

202427106561 is an frugal number, since it uses more digits than its factorization.

202427106561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99994 (or 49994 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

Multiplying 202427106561 by its sum of digits (36), we get a square (7287375836196 = 2699514²).

The spelling of 202427106561 in words is "two hundred two billion, four hundred twenty-seven million, one hundred six thousand, five hundred sixty-one".