613287656 has 16 divisors (see below), whose sum is σ = 1168766340. Its totient is φ = 301616640.

The previous prime is 613287611. The next prime is 613287659. The reversal of 613287656 is 656782316.

It can be written as a sum of positive squares in 2 ways, for example, as 563302756 + 49984900 = 23734^2 + 7070^2 .

It is a super-2 number, since 2×613287656² = 752243498003948672, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (613287659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627881 + ... + 628856.

Almost surely, 2^613287656 is an apocalyptic number.

It is an amenable number.

613287656 is a deficient number, since it is larger than the sum of its proper divisors (555478684).

613287656 is a wasteful number, since it uses less digits than its factorization.

613287656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256804 (or 1256800 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 613287656 is about 24764.6452831451. The cubic root of 613287656 is about 849.6135064109.

The spelling of 613287656 in words is "six hundred thirteen million, two hundred eighty-seven thousand, six hundred fifty-six".