616881765 has 16 divisors (see below), whose sum is σ = 1021046400. Its totient is φ = 317658432.

The previous prime is 616881761. The next prime is 616881767. The reversal of 616881765 is 567188616.

616881765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 616881765 - 2² = 616881761 is a prime.

It is a super-2 number, since 2×616881765² = 761086223979030450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616881761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708625 + ... + 709494.

It is an arithmetic number, because the mean of its divisors is an integer number (63815400).

Almost surely, 2^616881765 is an apocalyptic number.

It is an amenable number.

616881765 is a deficient number, since it is larger than the sum of its proper divisors (404164635).

616881765 is a wasteful number, since it uses less digits than its factorization.

616881765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418156.

The product of its digits is 483840, while the sum is 48.

The square root of 616881765 is about 24837.1046017848. The cubic root of 616881765 is about 851.2699655271.

The spelling of 616881765 in words is "six hundred sixteen million, eight hundred eighty-one thousand, seven hundred sixty-five".