40404040403999 has 4 divisors (see below), whose sum is σ = 40422347628864. Its totient is φ = 40385733179136.

The previous prime is 40404040403927. The next prime is 40404040404011. The reversal of 40404040403999 is 99930404040404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40404040403999 - 2⁸ = 40404040403743 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 (40404040403299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9153609122 + ... + 9153613535.

It is an arithmetic number, because the mean of its divisors is an integer number (10105586907216).

Almost surely, 2^{40404040403999} is an apocalyptic number.

40404040403999 is a deficient number, since it is larger than the sum of its proper divisors (18307224865).

40404040403999 is a wasteful number, since it uses less digits than its factorization.

40404040403999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18307224864.

The product of its (nonzero) digits is 2239488, while the sum is 50.

The spelling of 40404040403999 in words is "forty trillion, four hundred four billion, forty million, four hundred three thousand, nine hundred ninety-nine".