616491215 has 32 divisors (see below), whose sum is σ = 774385920. Its totient is φ = 470808576.

The previous prime is 616491191. The next prime is 616491217. The reversal of 616491215 is 512194616.

It is a cyclic number.

It is not a de Polignac number, because 616491215 - 2¹⁰ = 616490191 is a prime.

It is a super-2 number, since 2×616491215² = 760122836344352450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616491217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3194159 + ... + 3194351.

It is an arithmetic number, because the mean of its divisors is an integer number (24199560).

Almost surely, 2^616491215 is an apocalyptic number.

616491215 is a deficient number, since it is larger than the sum of its proper divisors (157894705).

616491215 is a wasteful number, since it uses less digits than its factorization.

616491215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its digits is 12960, while the sum is 35.

The square root of 616491215 is about 24829.2411281537. The cubic root of 616491215 is about 851.0902802725.

It can be divided in two parts, 6164 and 91215, that added together give a palindrome (97379).

The spelling of 616491215 in words is "six hundred sixteen million, four hundred ninety-one thousand, two hundred fifteen".