40404037217 has 2 divisors, whose sum is σ = 40404037218. Its totient is φ = 40404037216.

The previous prime is 40404037213. The next prime is 40404037229. The reversal of 40404037217 is 71273040404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38925711616 + 1478325601 = 197296^2 + 38449^2 .

It is a cyclic number.

It is not a de Polignac number, because 40404037217 - 2² = 40404037213 is a prime.

It is a super-2 number, since 2×40404037217² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40404037213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202018608 + 20202018609.

It is an arithmetic number, because the mean of its divisors is an integer number (20202018609).

Almost surely, 2^40404037217 is an apocalyptic number.

It is an amenable number.

40404037217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404037217 is an equidigital number, since it uses as much as digits as its factorization.

40404037217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 32.

The spelling of 40404037217 in words is "forty billion, four hundred four million, thirty-seven thousand, two hundred seventeen".