616616517 has 32 divisors (see below), whose sum is σ = 921102336. Its totient is φ = 363686400.

The previous prime is 616616513. The next prime is 616616549. The reversal of 616616517 is 715616616.

It is not a de Polignac number, because 616616517 - 2² = 616616513 is a prime.

It is a super-2 number, since 2×616616517² = 760431858074422578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616616513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 500292 + ... + 501522.

It is an arithmetic number, because the mean of its divisors is an integer number (28784448).

Almost surely, 2^616616517 is an apocalyptic number.

It is an amenable number.

616616517 is a deficient number, since it is larger than the sum of its proper divisors (304485819).

616616517 is a wasteful number, since it uses less digits than its factorization.

616616517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641.

The product of its digits is 45360, while the sum is 39.

The square root of 616616517 is about 24831.7642748154. The cubic root of 616616517 is about 851.1479378068.

Subtracting 616616517 from its reverse (715616616), we obtain a palindrome (99000099).

The spelling of 616616517 in words is "six hundred sixteen million, six hundred sixteen thousand, five hundred seventeen".