16685400374005 has 32 divisors (see below), whose sum is σ = 22433545267200. Its totient is φ = 11806607070720.

The previous prime is 16685400373987. The next prime is 16685400374017. The reversal of 16685400374005 is 50047300458661.

It is not a de Polignac number, because 16685400374005 - 2⁵ = 16685400373973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16685400374005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176706796 + ... + 176801194.

It is an arithmetic number, because the mean of its divisors is an integer number (701048289600).

Almost surely, 2^{16685400374005} is an apocalyptic number.

It is an amenable number.

16685400374005 is a deficient number, since it is larger than the sum of its proper divisors (5748144893195).

16685400374005 is a wasteful number, since it uses less digits than its factorization.

16685400374005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181309.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 16685400374005 in words is "sixteen trillion, six hundred eighty-five billion, four hundred million, three hundred seventy-four thousand, five".