655641256 has 8 divisors (see below), whose sum is σ = 1229327370. Its totient is φ = 327820624.

The previous prime is 655641229. The next prime is 655641269. The reversal of 655641256 is 652146556.

It can be written as a sum of positive squares in only one way, i.e., 347076900 + 308564356 = 18630^2 + 17566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40977571 + ... + 40977586.

Almost surely, 2^655641256 is an apocalyptic number.

It is an amenable number.

655641256 is a deficient number, since it is larger than the sum of its proper divisors (573686114).

655641256 is a wasteful number, since it uses less digits than its factorization.

655641256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81955163 (or 81955159 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

The square root of 655641256 is about 25605.4926919987. The cubic root of 655641256 is about 868.7378783672.

The spelling of 655641256 in words is "six hundred fifty-five million, six hundred forty-one thousand, two hundred fifty-six".