40405206851699 has 2 divisors, whose sum is σ = 40405206851700. Its totient is φ = 40405206851698.

The previous prime is 40405206851689. The next prime is 40405206851749. The reversal of 40405206851699 is 99615860250404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40405206851699 - 2⁴ = 40405206851683 is a prime.

It is not a weakly prime, because it can be changed into another prime (40405206851689) 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, 20202603425849 + 20202603425850.

It is an arithmetic number, because the mean of its divisors is an integer number (20202603425850).

Almost surely, 2^{40405206851699} is an apocalyptic number.

40405206851699 is a deficient number, since it is larger than the sum of its proper divisors (1).

40405206851699 is an equidigital number, since it uses as much as digits as its factorization.

40405206851699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 40405206851699 in words is "forty trillion, four hundred five billion, two hundred six million, eight hundred fifty-one thousand, six hundred ninety-nine".