616313621 has 36 divisors (see below), whose sum is σ = 829664640. Its totient is φ = 454885200.

The previous prime is 616313611. The next prime is 616313651. The reversal of 616313621 is 126313616.

It is a happy number.

It is not a de Polignac number, because 616313621 - 2⁶ = 616313557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616313611) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 109916 + ... + 115386.

It is an arithmetic number, because the mean of its divisors is an integer number (23046240).

Almost surely, 2^616313621 is an apocalyptic number.

It is an amenable number.

616313621 is a deficient number, since it is larger than the sum of its proper divisors (213351019).

616313621 is a wasteful number, since it uses less digits than its factorization.

616313621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5526 (or 5508 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 616313621 is about 24825.6645631089. The cubic root of 616313621 is about 851.0085472650.

The spelling of 616313621 in words is "six hundred sixteen million, three hundred thirteen thousand, six hundred twenty-one".