40404404431 has 2 divisors, whose sum is σ = 40404404432. Its totient is φ = 40404404430.

The previous prime is 40404404423. The next prime is 40404404477. The reversal of 40404404431 is 13440440404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40404404431 - 2³ = 40404404423 is a prime.

It is a super-2 number, since 2×40404404431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40404404431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40404414431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202202215 + 20202202216.

It is an arithmetic number, because the mean of its divisors is an integer number (20202202216).

Almost surely, 2^40404404431 is an apocalyptic number.

40404404431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404404431 is an equidigital number, since it uses as much as digits as its factorization.

40404404431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 40404404431 its reverse (13440440404), we get a palindrome (53844844835).

The spelling of 40404404431 in words is "forty billion, four hundred four million, four hundred four thousand, four hundred thirty-one".