39808843830643 has 2 divisors, whose sum is σ = 39808843830644. Its totient is φ = 39808843830642.

The previous prime is 39808843830619. The next prime is 39808843830653. The reversal of 39808843830643 is 34603834880893.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39808843830643 is a prime.

It is not a weakly prime, because it can be changed into another prime (39808843830653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19904421915321 + 19904421915322.

It is an arithmetic number, because the mean of its divisors is an integer number (19904421915322).

Almost surely, 2^{39808843830643} is an apocalyptic number.

39808843830643 is a deficient number, since it is larger than the sum of its proper divisors (1).

39808843830643 is an equidigital number, since it uses as much as digits as its factorization.

39808843830643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 286654464, while the sum is 67.

The spelling of 39808843830643 in words is "thirty-nine trillion, eight hundred eight billion, eight hundred forty-three million, eight hundred thirty thousand, six hundred forty-three".