616728717 has 12 divisors (see below), whose sum is σ = 971815104. Its totient is φ = 373774920.

The previous prime is 616728709. The next prime is 616728773. The reversal of 616728717 is 717827616.

616728717 is a `hidden beast` number, since 616 + 7 + 28 + 7 + 1 + 7 = 666.

It is not a de Polignac number, because 616728717 - 2³ = 616728709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616718717) 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 11 ways as a sum of consecutive naturals, for example, 3114693 + ... + 3114890.

It is an arithmetic number, because the mean of its divisors is an integer number (80984592).

Almost surely, 2^616728717 is an apocalyptic number.

It is an amenable number.

616728717 is a deficient number, since it is larger than the sum of its proper divisors (355086387).

616728717 is a wasteful number, since it uses less digits than its factorization.

616728717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229600 (or 6229597 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 616728717 is about 24834.0233752004. The cubic root of 616728717 is about 851.1995598464.

The spelling of 616728717 in words is "six hundred sixteen million, seven hundred twenty-eight thousand, seven hundred seventeen".