616815564 has 48 divisors (see below), whose sum is σ = 1536767232. Its totient is φ = 192088512.

The previous prime is 616815527. The next prime is 616815571. The reversal of 616815564 is 465518616.

It is a super-2 number, since 2×616815564² = 760922879985276192, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14119 + ... + 37854.

It is an arithmetic number, because the mean of its divisors is an integer number (32015984).

Almost surely, 2^616815564 is an apocalyptic number.

It is an amenable number.

616815564 is an abundant number, since it is smaller than the sum of its proper divisors (919951668).

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

616815564 is a wasteful number, since it uses less digits than its factorization.

616815564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52046 (or 52044 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 616815564 is about 24835.7718623763. The cubic root of 616815564 is about 851.2395129390.

The spelling of 616815564 in words is "six hundred sixteen million, eight hundred fifteen thousand, five hundred sixty-four".