400040004045 has 32 divisors (see below), whose sum is σ = 735001735680. Its totient is φ = 183750431040.

The previous prime is 400040003983. The next prime is 400040004097. The reversal of 400040004045 is 540400040004.

It is not a de Polignac number, because 400040004045 - 2⁶ = 400040003981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63799099 + ... + 63805368.

It is an arithmetic number, because the mean of its divisors is an integer number (22968804240).

Almost surely, 2^400040004045 is an apocalyptic number.

It is an amenable number.

400040004045 is a deficient number, since it is larger than the sum of its proper divisors (334961731635).

400040004045 is a wasteful number, since it uses less digits than its factorization.

400040004045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127604505.

The product of its (nonzero) digits is 1280, while the sum is 21.

Adding to 400040004045 its reverse (540400040004), we get a palindrome (940440044049).

The spelling of 400040004045 in words is "four hundred billion, forty million, four thousand, forty-five".