40491839184163 has 2 divisors, whose sum is σ = 40491839184164. Its totient is φ = 40491839184162.

The previous prime is 40491839184161. The next prime is 40491839184227. The reversal of 40491839184163 is 36148193819404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40491839184163 - 2¹ = 40491839184161 is a prime.

It is a super-2 number, since 2×40491839184163² (a number of 28 digits) contains 22 as substring.

Together with 40491839184161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40491839184161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20245919592081 + 20245919592082.

It is an arithmetic number, because the mean of its divisors is an integer number (20245919592082).

Almost surely, 2^{40491839184163} is an apocalyptic number.

40491839184163 is a deficient number, since it is larger than the sum of its proper divisors (1).

40491839184163 is an equidigital number, since it uses as much as digits as its factorization.

40491839184163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 40491839184163 in words is "forty trillion, four hundred ninety-one billion, eight hundred thirty-nine million, one hundred eighty-four thousand, one hundred sixty-three".