39078745613 has 2 divisors, whose sum is σ = 39078745614. Its totient is φ = 39078745612.

The previous prime is 39078745609. The next prime is 39078745621. The reversal of 39078745613 is 31654787093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20643080329 + 18435665284 = 143677^2 + 135778^2 .

It is a cyclic number.

It is not a de Polignac number, because 39078745613 - 2² = 39078745609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39078745603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19539372806 + 19539372807.

It is an arithmetic number, because the mean of its divisors is an integer number (19539372807).

Almost surely, 2^39078745613 is an apocalyptic number.

It is an amenable number.

39078745613 is a deficient number, since it is larger than the sum of its proper divisors (1).

39078745613 is an equidigital number, since it uses as much as digits as its factorization.

39078745613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 39078745613 in words is "thirty-nine billion, seventy-eight million, seven hundred forty-five thousand, six hundred thirteen".