40440864859 has 2 divisors, whose sum is σ = 40440864860. Its totient is φ = 40440864858.

The previous prime is 40440864809. The next prime is 40440864929. The reversal of 40440864859 is 95846804404.

40440864859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40440864859 - 2⁷ = 40440864731 is a prime.

It is not a weakly prime, because it can be changed into another prime (40440864809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220432429 + 20220432430.

It is an arithmetic number, because the mean of its divisors is an integer number (20220432430).

Almost surely, 2^40440864859 is an apocalyptic number.

40440864859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440864859 is an equidigital number, since it uses as much as digits as its factorization.

40440864859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4423680, while the sum is 52.

The spelling of 40440864859 in words is "forty billion, four hundred forty million, eight hundred sixty-four thousand, eight hundred fifty-nine".