613313856 has 140 divisors (see below), whose sum is σ = 1830455572. Its totient is φ = 203046912.

The previous prime is 613313843. The next prime is 613313873. The reversal of 613313856 is 658313316.

It is a happy number.

613313856 is a `hidden beast` number, since 613 + 3 + 1 + 38 + 5 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 48776256 + 564537600 = 6984^2 + 23760^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 613313856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1000206 + ... + 1000818.

Almost surely, 2^613313856 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 613313856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915227786).

613313856 is an abundant number, since it is smaller than the sum of its proper divisors (1217141716).

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

613313856 is a wasteful number, since it uses less digits than its factorization.

613313856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 811 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 613313856 is about 24765.1742574124. The cubic root of 613313856 is about 849.6256048972.

The spelling of 613313856 in words is "six hundred thirteen million, three hundred thirteen thousand, eight hundred fifty-six".