408816965919 has 16 divisors (see below), whose sum is σ = 562287639168. Its totient is φ = 264010368672.

The previous prime is 408816965917. The next prime is 408816965959. The reversal of 408816965919 is 919569618804.

It is not a de Polignac number, because 408816965919 - 2¹ = 408816965917 is a prime.

It is a super-2 number, since 2×408816965919² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 408816965919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408816965911) 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, 8087217 + ... + 8137610.

It is an arithmetic number, because the mean of its divisors is an integer number (35142977448).

Almost surely, 2^408816965919 is an apocalyptic number.

408816965919 is a deficient number, since it is larger than the sum of its proper divisors (153470673249).

408816965919 is a wasteful number, since it uses less digits than its factorization.

408816965919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16225094.

The product of its (nonzero) digits is 33592320, while the sum is 66.

The spelling of 408816965919 in words is "four hundred eight billion, eight hundred sixteen million, nine hundred sixty-five thousand, nine hundred nineteen".