400404789063839 has 16 divisors (see below), whose sum is σ = 464498655544320. Its totient is φ = 338054856441120.

The previous prime is 400404789063809. The next prime is 400404789063913. The reversal of 400404789063839 is 938360987404004.

It is a de Polignac number, because none of the positive numbers 2^k-400404789063839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400404789063809) 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, 859695089 + ... + 860160714.

It is an arithmetic number, because the mean of its divisors is an integer number (29031165971520).

Almost surely, 2^{400404789063839} is an apocalyptic number.

400404789063839 is a deficient number, since it is larger than the sum of its proper divisors (64093866480481).

400404789063839 is a wasteful number, since it uses less digits than its factorization.

400404789063839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719856310.

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 400404789063839 in words is "four hundred trillion, four hundred four billion, seven hundred eighty-nine million, sixty-three thousand, eight hundred thirty-nine".