616645244 has 24 divisors (see below), whose sum is σ = 1095306240. Its totient is φ = 303718896.

The previous prime is 616645243. The next prime is 616645297. The reversal of 616645244 is 442546616.

It is a junction number, because it is equal to n+sod(n) for n = 616645198 and 616645207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616645243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151889 + ... + 155895.

It is an arithmetic number, because the mean of its divisors is an integer number (45637760).

Almost surely, 2^616645244 is an apocalyptic number.

It is an amenable number.

616645244 is a deficient number, since it is larger than the sum of its proper divisors (478660996).

616645244 is a wasteful number, since it uses less digits than its factorization.

616645244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4577 (or 4575 counting only the distinct ones).

The product of its digits is 138240, while the sum is 38.

The square root of 616645244 is about 24832.3427005992. The cubic root of 616645244 is about 851.1611553936.

The spelling of 616645244 in words is "six hundred sixteen million, six hundred forty-five thousand, two hundred forty-four".