16390039043818 has 16 divisors (see below), whose sum is σ = 28397714707584. Its totient is φ = 7011781408960.

The previous prime is 16390039043771. The next prime is 16390039043821. The reversal of 16390039043818 is 81834093009361.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21911816530 + ... + 21911817277.

It is an arithmetic number, because the mean of its divisors is an integer number (1774857169224).

Almost surely, 2^{16390039043818} is an apocalyptic number.

16390039043818 is a deficient number, since it is larger than the sum of its proper divisors (12007675663766).

16390039043818 is a wasteful number, since it uses less digits than its factorization.

16390039043818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43823633837.

The product of its (nonzero) digits is 3359232, while the sum is 55.

The spelling of 16390039043818 in words is "sixteen trillion, three hundred ninety billion, thirty-nine million, forty-three thousand, eight hundred eighteen".