40007942435917 has 2 divisors, whose sum is σ = 40007942435918. Its totient is φ = 40007942435916.

The previous prime is 40007942435887. The next prime is 40007942435939. The reversal of 40007942435917 is 71953424970004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39912840510921 + 95101924996 = 6317661^2 + 308386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40007942435917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40007942435957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20003971217958 + 20003971217959.

It is an arithmetic number, because the mean of its divisors is an integer number (20003971217959).

Almost surely, 2^{40007942435917} is an apocalyptic number.

It is an amenable number.

40007942435917 is a deficient number, since it is larger than the sum of its proper divisors (1).

40007942435917 is an equidigital number, since it uses as much as digits as its factorization.

40007942435917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 40007942435917 in words is "forty trillion, seven billion, nine hundred forty-two million, four hundred thirty-five thousand, nine hundred seventeen".