40999999999171 has 2 divisors, whose sum is σ = 40999999999172. Its totient is φ = 40999999999170.

The previous prime is 40999999999163. The next prime is 40999999999193. The reversal of 40999999999171 is 17199999999904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40999999999171 - 2³ = 40999999999163 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40999999999171.

It is not a weakly prime, because it can be changed into another prime (40999999999571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20499999999585 + 20499999999586.

It is an arithmetic number, because the mean of its divisors is an integer number (20499999999586).

Almost surely, 2^{40999999999171} is an apocalyptic number.

40999999999171 is a deficient number, since it is larger than the sum of its proper divisors (1).

40999999999171 is an equidigital number, since it uses as much as digits as its factorization.

40999999999171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10847773692, while the sum is 94.

The spelling of 40999999999171 in words is "forty trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred seventy-one".