40540405431 has 16 divisors (see below), whose sum is σ = 57619059200. Its totient is φ = 25280356608.

The previous prime is 40540405391. The next prime is 40540405487. The reversal of 40540405431 is 13450404504.

It is not a de Polignac number, because 40540405431 - 2⁷ = 40540405303 is a prime.

It is a super-2 number, since 2×40540405431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540405531) 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, 4496986 + ... + 4505991.

It is an arithmetic number, because the mean of its divisors is an integer number (3601191200).

Almost surely, 2^40540405431 is an apocalyptic number.

40540405431 is a deficient number, since it is larger than the sum of its proper divisors (17078653769).

40540405431 is a wasteful number, since it uses less digits than its factorization.

40540405431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9003078.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 40540405431 its reverse (13450404504), we get a palindrome (53990809935).

The spelling of 40540405431 in words is "forty billion, five hundred forty million, four hundred five thousand, four hundred thirty-one".