19983855513599 has 2 divisors, whose sum is σ = 19983855513600. Its totient is φ = 19983855513598.

The previous prime is 19983855513581. The next prime is 19983855513613. The reversal of 19983855513599 is 99531555838991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19983855513599 - 2²⁴ = 19983838736383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19983855513529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9991927756799 + 9991927756800.

It is an arithmetic number, because the mean of its divisors is an integer number (9991927756800).

Almost surely, 2^{19983855513599} is an apocalyptic number.

19983855513599 is a deficient number, since it is larger than the sum of its proper divisors (1).

19983855513599 is an equidigital number, since it uses as much as digits as its factorization.

19983855513599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2361960000, while the sum is 80.

The spelling of 19983855513599 in words is "nineteen trillion, nine hundred eighty-three billion, eight hundred fifty-five million, five hundred thirteen thousand, five hundred ninety-nine".