616989616 has 20 divisors (see below), whose sum is σ = 1236639600. Its totient is φ = 297856832.

The previous prime is 616989599. The next prime is 616989617.

616989616 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (616989617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664396 + ... + 665323.

It is an arithmetic number, because the mean of its divisors is an integer number (61831980).

Almost surely, 2^616989616 is an apocalyptic number.

It is an amenable number.

616989616 is an abundant number, since it is smaller than the sum of its proper divisors (619649984).

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

616989616 is a wasteful number, since it uses less digits than its factorization.

616989616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329756 (or 1329750 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 616989616 is about 24839.2756738195. The cubic root of 616989616 is about 851.3195725303.

The spelling of 616989616 in words is "six hundred sixteen million, nine hundred eighty-nine thousand, six hundred sixteen".