616523364 has 18 divisors (see below), whose sum is σ = 1558434150. Its totient is φ = 205507776.

The previous prime is 616523363. The next prime is 616523423. The reversal of 616523364 is 463325616.

616523364 is a `hidden beast` number, since 616 + 5 + 2 + 3 + 36 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 566820864 + 49702500 = 23808^2 + 7050^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 17125649 = 616523364 / (6 + 1 + 6 + 5 + 2 + 3 + 3 + 6 + 4).

It is not an unprimeable number, because it can be changed into a prime (616523363) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8562789 + ... + 8562860.

It is an arithmetic number, because the mean of its divisors is an integer number (86579675).

Almost surely, 2^616523364 is an apocalyptic number.

It is an amenable number.

616523364 is an abundant number, since it is smaller than the sum of its proper divisors (941910786).

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

616523364 is a wasteful number, since it uses less digits than its factorization.

616523364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17125659 (or 17125654 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 616523364 is about 24829.8885216990. Note that the first 3 decimals coincide. The cubic root of 616523364 is about 851.1050743335.

The spelling of 616523364 in words is "six hundred sixteen million, five hundred twenty-three thousand, three hundred sixty-four".