40020273773917 has 2 divisors, whose sum is σ = 40020273773918. Its totient is φ = 40020273773916.

The previous prime is 40020273773863. The next prime is 40020273773923. The reversal of 40020273773917 is 71937737202004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38844667037401 + 1175606736516 = 6232549^2 + 1084254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40020273773917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40020271773917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20010136886958 + 20010136886959.

It is an arithmetic number, because the mean of its divisors is an integer number (20010136886959).

Almost surely, 2^{40020273773917} is an apocalyptic number.

It is an amenable number.

40020273773917 is a deficient number, since it is larger than the sum of its proper divisors (1).

40020273773917 is an equidigital number, since it uses as much as digits as its factorization.

40020273773917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3111696, while the sum is 52.

The spelling of 40020273773917 in words is "forty trillion, twenty billion, two hundred seventy-three million, seven hundred seventy-three thousand, nine hundred seventeen".