39413945509 has 2 divisors, whose sum is σ = 39413945510. Its totient is φ = 39413945508.

The previous prime is 39413945489. The next prime is 39413945531. The reversal of 39413945509 is 90554931493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39334788900 + 79156609 = 198330^2 + 8897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39413945509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39413945539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19706972754 + 19706972755.

It is an arithmetic number, because the mean of its divisors is an integer number (19706972755).

Almost surely, 2^39413945509 is an apocalyptic number.

It is an amenable number.

39413945509 is a deficient number, since it is larger than the sum of its proper divisors (1).

39413945509 is an equidigital number, since it uses as much as digits as its factorization.

39413945509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2624400, while the sum is 52.

The spelling of 39413945509 in words is "thirty-nine billion, four hundred thirteen million, nine hundred forty-five thousand, five hundred nine".