40405844659 has 2 divisors, whose sum is σ = 40405844660. Its totient is φ = 40405844658.

The previous prime is 40405844629. The next prime is 40405844693. The reversal of 40405844659 is 95644850404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40405844659 - 2⁵ = 40405844627 is a prime.

It is not a weakly prime, because it can be changed into another prime (40405844629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202922329 + 20202922330.

It is an arithmetic number, because the mean of its divisors is an integer number (20202922330).

Almost surely, 2^40405844659 is an apocalyptic number.

40405844659 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405844659 is an equidigital number, since it uses as much as digits as its factorization.

40405844659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2764800, while the sum is 49.

The spelling of 40405844659 in words is "forty billion, four hundred five million, eight hundred forty-four thousand, six hundred fifty-nine".