16804786405 has 16 divisors (see below), whose sum is σ = 22046540544. Its totient is φ = 12195247680.

The previous prime is 16804786393. The next prime is 16804786421. The reversal of 16804786405 is 50468740861.

It is not a de Polignac number, because 16804786405 - 2²³ = 16796397797 is a prime.

It is a super-2 number, since 2×16804786405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 304494 + ... + 355423.

It is an arithmetic number, because the mean of its divisors is an integer number (1377908784).

Almost surely, 2^16804786405 is an apocalyptic number.

It is an amenable number.

16804786405 is a deficient number, since it is larger than the sum of its proper divisors (5241754139).

16804786405 is a wasteful number, since it uses less digits than its factorization.

16804786405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660396.

The product of its (nonzero) digits is 1290240, while the sum is 49.

It can be divided in two parts, 168047 and 86405, that added together give a palindrome (254452).

The spelling of 16804786405 in words is "sixteen billion, eight hundred four million, seven hundred eighty-six thousand, four hundred five".