616605064 has 8 divisors (see below), whose sum is σ = 1156134510. Its totient is φ = 308302528.

The previous prime is 616605013. The next prime is 616605107. The reversal of 616605064 is 460506616.

It can be written as a sum of positive squares in only one way, i.e., 601720900 + 14884164 = 24530^2 + 3858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38537809 + ... + 38537824.

Almost surely, 2^616605064 is an apocalyptic number.

It is an amenable number.

616605064 is a deficient number, since it is larger than the sum of its proper divisors (539529446).

616605064 is a wasteful number, since it uses less digits than its factorization.

616605064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77075639 (or 77075635 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 616605064 is about 24831.5336618583. The cubic root of 616605064 is about 851.1426680498.

The spelling of 616605064 in words is "six hundred sixteen million, six hundred five thousand, sixty-four".