616561572 has 48 divisors (see below), whose sum is σ = 1572379200. Its totient is φ = 186485760.

The previous prime is 616561523. The next prime is 616561579. The reversal of 616561572 is 275165616.

It is a super-2 number, since 2×616561572² = 760296344134222368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 616561572.

It is not an unprimeable number, because it can be changed into a prime (616561579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71004 + ... + 79212.

It is an arithmetic number, because the mean of its divisors is an integer number (32757900).

Almost surely, 2^616561572 is an apocalyptic number.

It is an amenable number.

616561572 is an abundant number, since it is smaller than the sum of its proper divisors (955817628).

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

616561572 is a wasteful number, since it uses less digits than its factorization.

616561572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796 (or 8794 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 616561572 is about 24830.6579050979. The cubic root of 616561572 is about 851.1226559061.

The spelling of 616561572 in words is "six hundred sixteen million, five hundred sixty-one thousand, five hundred seventy-two".