616621616 has 20 divisors (see below), whose sum is σ = 1286605152. Its totient is φ = 284594496.

The previous prime is 616621609. The next prime is 616621627. The reversal of 616621616 is 616126616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482056 + ... + 1482471.

Almost surely, 2^616621616 is an apocalyptic number.

It is an amenable number.

616621616 is an abundant number, since it is smaller than the sum of its proper divisors (669983536).

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

616621616 is a wasteful number, since it uses less digits than its factorization.

616621616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2964548 (or 2964542 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 616621616 is about 24831.8669455198. The cubic root of 616621616 is about 851.1502839389.

The spelling of 616621616 in words is "six hundred sixteen million, six hundred twenty-one thousand, six hundred sixteen".