616598716644 has 27 divisors (see below), whose sum is σ = 1558636443273. Its totient is φ = 205531335072.

The previous prime is 616598716639. The next prime is 616598716687. The reversal of 616598716644 is 446617895616.

It is a happy number.

The square root of 616598716644 is 785238.

It is a perfect power (a square), and thus also a powerful number.

616598716644 is a `hidden beast` number, since 616 + 5 + 9 + 8 + 7 + 1 + 6 + 6 + 4 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5875222500 + 610723494144 = 76650^2 + 781488^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4645992 + ... + 4776864.

Almost surely, 2^616598716644 is an apocalyptic number.

616598716644 is the 785238-th square number.

It is an amenable number.

616598716644 is an abundant number, since it is smaller than the sum of its proper divisors (942037726629).

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

616598716644 is an frugal number, since it uses more digits than its factorization.

616598716644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261756 (or 130878 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 616598716644 in words is "six hundred sixteen billion, five hundred ninety-eight million, seven hundred sixteen thousand, six hundred forty-four".