616500645 has 32 divisors (see below), whose sum is σ = 1009608192. Its totient is φ = 321096192.

The previous prime is 616500583. The next prime is 616500653. The reversal of 616500645 is 546005616.

616500645 = 35² + 36² + ... + 1227².

It is not a de Polignac number, because 616500645 - 2⁷ = 616500517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516169 + ... + 517361.

It is an arithmetic number, because the mean of its divisors is an integer number (31550256).

Almost surely, 2^616500645 is an apocalyptic number.

It is an amenable number.

616500645 is a deficient number, since it is larger than the sum of its proper divisors (393107547).

616500645 is a wasteful number, since it uses less digits than its factorization.

616500645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 616500645 is about 24829.4310244919. The cubic root of 616500645 is about 851.0946197453.

The spelling of 616500645 in words is "six hundred sixteen million, five hundred thousand, six hundred forty-five".