40649237017 has 2 divisors, whose sum is σ = 40649237018. Its totient is φ = 40649237016.

The previous prime is 40649236931. The next prime is 40649237023. The reversal of 40649237017 is 71073294604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39972404761 + 676832256 = 199931^2 + 26016^2 .

It is a cyclic number.

It is not a de Polignac number, because 40649237017 - 2⁷ = 40649236889 is a prime.

It is not a weakly prime, because it can be changed into another prime (40649237117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20324618508 + 20324618509.

It is an arithmetic number, because the mean of its divisors is an integer number (20324618509).

Almost surely, 2^40649237017 is an apocalyptic number.

It is an amenable number.

40649237017 is a deficient number, since it is larger than the sum of its proper divisors (1).

40649237017 is an equidigital number, since it uses as much as digits as its factorization.

40649237017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 40649237017 in words is "forty billion, six hundred forty-nine million, two hundred thirty-seven thousand, seventeen".