613568256 has 144 divisors (see below), whose sum is σ = 1897878528. Its totient is φ = 172339200.

The previous prime is 613568243. The next prime is 613568257. The reversal of 613568256 is 652865316.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613568257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327001 + ... + 328871.

It is an arithmetic number, because the mean of its divisors is an integer number (13179712).

Almost surely, 2^613568256 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 613568256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948939264).

613568256 is an abundant number, since it is smaller than the sum of its proper divisors (1284310272).

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

613568256 is a wasteful number, since it uses less digits than its factorization.

613568256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958 (or 1944 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The square root of 613568256 is about 24770.3099698005. The cubic root of 613568256 is about 849.7430623639.

The spelling of 613568256 in words is "six hundred thirteen million, five hundred sixty-eight thousand, two hundred fifty-six".