40042041217 has 2 divisors, whose sum is σ = 40042041218. Its totient is φ = 40042041216.

The previous prime is 40042041209. The next prime is 40042041239. The reversal of 40042041217 is 71214024004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32909225281 + 7132815936 = 181409^2 + 84456^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042041217 - 2³ = 40042041209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40042041191 and 40042041200.

It is not a weakly prime, because it can be changed into another prime (40042041257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021020608 + 20021020609.

It is an arithmetic number, because the mean of its divisors is an integer number (20021020609).

Almost surely, 2^40042041217 is an apocalyptic number.

It is an amenable number.

40042041217 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042041217 is an equidigital number, since it uses as much as digits as its factorization.

40042041217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The spelling of 40042041217 in words is "forty billion, forty-two million, forty-one thousand, two hundred seventeen".