616831616 has 32 divisors (see below), whose sum is σ = 1229992500. Its totient is φ = 308127744.

The previous prime is 616831571. The next prime is 616831627. The reversal of 616831616 is 616138616.

It can be written as a sum of positive squares in 2 ways, for example, as 462078016 + 154753600 = 21496^2 + 12440^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 616831616.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223010 + ... + 225758.

Almost surely, 2^616831616 is an apocalyptic number.

It is an amenable number.

616831616 is a deficient number, since it is larger than the sum of its proper divisors (613160884).

616831616 is a wasteful number, since it uses less digits than its factorization.

616831616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516 (or 4504 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 616831616 is about 24836.0950231714. The cubic root of 616831616 is about 851.2468970901.

The spelling of 616831616 in words is "six hundred sixteen million, eight hundred thirty-one thousand, six hundred sixteen".