40400432539 has 2 divisors, whose sum is σ = 40400432540. Its totient is φ = 40400432538.

The previous prime is 40400432531. The next prime is 40400432543. The reversal of 40400432539 is 93523400404.

It is a happy number.

40400432539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40400432539 - 2³ = 40400432531 is a prime.

It is not a weakly prime, because it can be changed into another prime (40400432531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20200216269 + 20200216270.

It is an arithmetic number, because the mean of its divisors is an integer number (20200216270).

Almost surely, 2^40400432539 is an apocalyptic number.

40400432539 is a deficient number, since it is larger than the sum of its proper divisors (1).

40400432539 is an equidigital number, since it uses as much as digits as its factorization.

40400432539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 40400432539 in words is "forty billion, four hundred million, four hundred thirty-two thousand, five hundred thirty-nine".