613861056 has 84 divisors (see below), whose sum is σ = 1788468864. Its totient is φ = 201254400.

The previous prime is 613861049. The next prime is 613861057. The reversal of 613861056 is 650168316.

It is a happy number.

613861056 is a `hidden beast` number, since 6 + 1 + 38 + 610 + 5 + 6 = 666.

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 613861056.

It is not an unprimeable number, because it can be changed into a prime (613861057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26401 + ... + 43871.

It is an arithmetic number, because the mean of its divisors is an integer number (21291296).

Almost surely, 2^613861056 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 613861056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (894234432).

613861056 is an abundant number, since it is smaller than the sum of its proper divisors (1174607808).

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

613861056 is a wasteful number, since it uses less digits than its factorization.

613861056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17550 (or 17537 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 613861056 is about 24776.2195663503. The cubic root of 613861056 is about 849.8782090785.

The spelling of 613861056 in words is "six hundred thirteen million, eight hundred sixty-one thousand, fifty-six".