616521652 has 24 divisors (see below), whose sum is σ = 1157133600. Its totient is φ = 286524576.

The previous prime is 616521637. The next prime is 616521667. The reversal of 616521652 is 256125616.

It is an interprime number because it is at equal distance from previous prime (616521637) and next prime (616521667).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72502 + ... + 80557.

It is an arithmetic number, because the mean of its divisors is an integer number (48213900).

Almost surely, 2^616521652 is an apocalyptic number.

It is an amenable number.

616521652 is a deficient number, since it is larger than the sum of its proper divisors (540611948).

616521652 is a wasteful number, since it uses less digits than its factorization.

616521652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153135 (or 153133 counting only the distinct ones).

The product of its digits is 21600, while the sum is 34.

The square root of 616521652 is about 24829.8540470942. The cubic root of 616521652 is about 851.1042865324.

The spelling of 616521652 in words is "six hundred sixteen million, five hundred twenty-one thousand, six hundred fifty-two".