655810256 has 10 divisors (see below), whose sum is σ = 1270632402. Its totient is φ = 327905120.

The previous prime is 655810249. The next prime is 655810261. The reversal of 655810256 is 652018556.

It can be written as a sum of positive squares in only one way, i.e., 506970256 + 148840000 = 22516^2 + 12200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20494055 + ... + 20494086.

Almost surely, 2^655810256 is an apocalyptic number.

It is an amenable number.

655810256 is a deficient number, since it is larger than the sum of its proper divisors (614822146).

655810256 is a wasteful number, since it uses less digits than its factorization.

655810256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40988149 (or 40988143 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 655810256 is about 25608.7925525590. The cubic root of 655810256 is about 868.8125147568.

The spelling of 655810256 in words is "six hundred fifty-five million, eight hundred ten thousand, two hundred fifty-six".