39516040309 has 2 divisors, whose sum is σ = 39516040310. Its totient is φ = 39516040308.

The previous prime is 39516040297. The next prime is 39516040357. The reversal of 39516040309 is 90304061593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22275562500 + 17240477809 = 149250^2 + 131303^2 .

It is a cyclic number.

It is not a de Polignac number, because 39516040309 - 2¹⁵ = 39516007541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39516040009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19758020154 + 19758020155.

It is an arithmetic number, because the mean of its divisors is an integer number (19758020155).

Almost surely, 2^39516040309 is an apocalyptic number.

It is an amenable number.

39516040309 is a deficient number, since it is larger than the sum of its proper divisors (1).

39516040309 is an equidigital number, since it uses as much as digits as its factorization.

39516040309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 39516040309 in words is "thirty-nine billion, five hundred sixteen million, forty thousand, three hundred nine".