616643536 has 10 divisors (see below), whose sum is σ = 1194746882. Its totient is φ = 308321760.

The previous prime is 616643513. The next prime is 616643543. The reversal of 616643536 is 635346616.

It can be written as a sum of positive squares in only one way, i.e., 525326400 + 91317136 = 22920^2 + 9556^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19270095 + ... + 19270126.

Almost surely, 2^616643536 is an apocalyptic number.

It is an amenable number.

616643536 is a deficient number, since it is larger than the sum of its proper divisors (578103346).

616643536 is a wasteful number, since it uses less digits than its factorization.

616643536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38540229 (or 38540223 counting only the distinct ones).

The product of its digits is 233280, while the sum is 40.

The square root of 616643536 is about 24832.3083099417. The cubic root of 616643536 is about 851.1603695368.

The spelling of 616643536 in words is "six hundred sixteen million, six hundred forty-three thousand, five hundred thirty-six".