518416390999 has 16 divisors (see below), whose sum is σ = 559195689472. Its totient is φ = 477766211328.

The previous prime is 518416390993. The next prime is 518416391027. The reversal of 518416390999 is 999093614815.

It is a cyclic number.

It is not a de Polignac number, because 518416390999 - 2⁷ = 518416390871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 518416390999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518416390993) 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, 50311882 + ... + 50322184.

It is an arithmetic number, because the mean of its divisors is an integer number (34949730592).

Almost surely, 2^518416390999 is an apocalyptic number.

518416390999 is a deficient number, since it is larger than the sum of its proper divisors (40779298473).

518416390999 is a wasteful number, since it uses less digits than its factorization.

518416390999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16186.

The product of its (nonzero) digits is 18895680, while the sum is 64.

The spelling of 518416390999 in words is "five hundred eighteen billion, four hundred sixteen million, three hundred ninety thousand, nine hundred ninety-nine".