613663872 has 64 divisors (see below), whose sum is σ = 1641914400. Its totient is φ = 203065344.

The previous prime is 613663847. The next prime is 613663891. The reversal of 613663872 is 278366316.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47628 + ... + 59124.

Almost surely, 2^613663872 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 613663872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820957200).

613663872 is an abundant number, since it is smaller than the sum of its proper divisors (1028250528).

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

613663872 is a wasteful number, since it uses less digits than its factorization.

613663872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11653 (or 11641 counting only the distinct ones).

The product of its digits is 217728, while the sum is 42.

The square root of 613663872 is about 24772.2399471667. The cubic root of 613663872 is about 849.7872002473.

The spelling of 613663872 in words is "six hundred thirteen million, six hundred sixty-three thousand, eight hundred seventy-two".