655226568 has 72 divisors (see below), whose sum is σ = 1797569670. Its totient is φ = 215614080.

The previous prime is 655226549. The next prime is 655226581. The reversal of 655226568 is 865622556.

655226568 is a `hidden beast` number, since 6 + 5 + 522 + 65 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 416894724 + 238331844 = 20418^2 + 15438^2 .

It is a tau number, because it is divible by the number of its divisors (72).

655226568 is a modest number, since divided by 26568 gives 6552 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 495348 + ... + 496668.

Almost surely, 2^655226568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655226568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898784835).

655226568 is an abundant number, since it is smaller than the sum of its proper divisors (1142343102).

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

655226568 is a wasteful number, since it uses less digits than its factorization.

655226568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1409 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 655226568 is about 25597.3937735856. The cubic root of 655226568 is about 868.5546830859.

The spelling of 655226568 in words is "six hundred fifty-five million, two hundred twenty-six thousand, five hundred sixty-eight".