225756866520 has 48 divisors (see below), whose sum is σ = 733709817360. Its totient is φ = 60201830976.

The previous prime is 225756866471. The next prime is 225756866549. The reversal of 225756866520 is 25668657522.

225756866520 is a `hidden beast` number, since 2 + 2 + 5 + 7 + 56 + 8 + 66 + 520 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 313550844 + ... + 313551563.

It is an arithmetic number, because the mean of its divisors is an integer number (15285621195).

Almost surely, 2^225756866520 is an apocalyptic number.

225756866520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225756866520 is an abundant number, since it is smaller than the sum of its proper divisors (507952950840).

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

225756866520 is a wasteful number, since it uses less digits than its factorization.

225756866520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627102424 (or 627102417 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 54.

The spelling of 225756866520 in words is "two hundred twenty-five billion, seven hundred fifty-six million, eight hundred sixty-six thousand, five hundred twenty".