40398818017 has 2 divisors, whose sum is σ = 40398818018. Its totient is φ = 40398818016.

The previous prime is 40398817951. The next prime is 40398818051. The reversal of 40398818017 is 71081889304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39315354961 + 1083463056 = 198281^2 + 32916^2 .

It is a cyclic number.

It is not a de Polignac number, because 40398818017 - 2²⁷ = 40264600289 is a prime.

It is a super-3 number, since 3×40398818017³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (40398810017) 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, 20199409008 + 20199409009.

It is an arithmetic number, because the mean of its divisors is an integer number (20199409009).

Almost surely, 2^40398818017 is an apocalyptic number.

It is an amenable number.

40398818017 is a deficient number, since it is larger than the sum of its proper divisors (1).

40398818017 is an equidigital number, since it uses as much as digits as its factorization.

40398818017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 40398818017 in words is "forty billion, three hundred ninety-eight million, eight hundred eighteen thousand, seventeen".