40464631439 has 2 divisors, whose sum is σ = 40464631440. Its totient is φ = 40464631438.

The previous prime is 40464631399. The next prime is 40464631447. The reversal of 40464631439 is 93413646404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40464631439 - 2⁸ = 40464631183 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40464631439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40464631139) by changing a digit.

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 as a sum of consecutive naturals, namely, 20232315719 + 20232315720.

It is an arithmetic number, because the mean of its divisors is an integer number (20232315720).

Almost surely, 2^40464631439 is an apocalyptic number.

40464631439 is a deficient number, since it is larger than the sum of its proper divisors (1).

40464631439 is an equidigital number, since it uses as much as digits as its factorization.

40464631439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 40464631439 in words is "forty billion, four hundred sixty-four million, six hundred thirty-one thousand, four hundred thirty-nine".