616345444 has 72 divisors (see below), whose sum is σ = 1332596160. Its totient is φ = 247304640.

The previous prime is 616345423. The next prime is 616345453. The reversal of 616345444 is 444543616.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142587 + ... + 146845.

It is an arithmetic number, because the mean of its divisors is an integer number (18508280).

Almost surely, 2^616345444 is an apocalyptic number.

It is an amenable number.

616345444 is an abundant number, since it is smaller than the sum of its proper divisors (716250716).

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

616345444 is a wasteful number, since it uses less digits than its factorization.

616345444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321 (or 4308 counting only the distinct ones).

The product of its digits is 138240, while the sum is 37.

The square root of 616345444 is about 24826.3054843043. The cubic root of 616345444 is about 851.0231941255.

The spelling of 616345444 in words is "six hundred sixteen million, three hundred forty-five thousand, four hundred forty-four".