225686502853956 has 81 divisors (see below), whose sum is σ = 606021399393501. Its totient is φ = 70803128006784.

The previous prime is 225686502853951. The next prime is 225686502853979. The reversal of 225686502853956 is 659358205686522.

The square root of 225686502853956 is 15022866.

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

225686502853956 is a `hidden beast` number, since 2 + 2 + 5 + 6 + 8 + 6 + 502 + 85 + 39 + 5 + 6 = 666.

225686502853956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 175707484920900 + 49979017933056 = 13255470^2 + 7069584^2 .

It is not an unprimeable number, because it can be changed into a prime (225686502853951) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1532258691 + ... + 1532405973.

Almost surely, 2^{225686502853956} is an apocalyptic number.

225686502853956 is the 15022866-th square number.

It is an amenable number.

225686502853956 is an abundant number, since it is smaller than the sum of its proper divisors (380334896539545).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225686502853956 is an frugal number, since it uses more digits than its factorization.

225686502853956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294610 (or 147305 counting only the distinct ones).

The product of its (nonzero) digits is 1866240000, while the sum is 72.

The spelling of 225686502853956 in words is "two hundred twenty-five trillion, six hundred eighty-six billion, five hundred two million, eight hundred fifty-three thousand, nine hundred fifty-six".