40406646444259 has 2 divisors, whose sum is σ = 40406646444260. Its totient is φ = 40406646444258.

The previous prime is 40406646444247. The next prime is 40406646444293. The reversal of 40406646444259 is 95244464660404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40406646444259 is a prime.

It is not a weakly prime, because it can be changed into another prime (40406646424259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203323222129 + 20203323222130.

It is an arithmetic number, because the mean of its divisors is an integer number (20203323222130).

Almost surely, 2^{40406646444259} is an apocalyptic number.

40406646444259 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406646444259 is an equidigital number, since it uses as much as digits as its factorization.

40406646444259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79626240, while the sum is 58.

The spelling of 40406646444259 in words is "forty trillion, four hundred six billion, six hundred forty-six million, four hundred forty-four thousand, two hundred fifty-nine".