19568848985 has 12 divisors (see below), whose sum is σ = 27316516068. Its totient is φ = 13418639136.

The previous prime is 19568848969. The next prime is 19568848987. The reversal of 19568848985 is 58984886591.

It can be written as a sum of positive squares in 2 ways, for example, as 6715638601 + 12853210384 = 81949^2 + 113372^2 .

It is not a de Polignac number, because 19568848985 - 2⁴ = 19568848969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19568848987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39936182 + ... + 39936671.

It is an arithmetic number, because the mean of its divisors is an integer number (2276376339).

Almost surely, 2^19568848985 is an apocalyptic number.

It is an amenable number.

19568848985 is a deficient number, since it is larger than the sum of its proper divisors (7747667083).

19568848985 is an equidigital number, since it uses as much as digits as its factorization.

19568848985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79872872 (or 79872865 counting only the distinct ones).

The product of its digits is 199065600, while the sum is 71.

The spelling of 19568848985 in words is "nineteen billion, five hundred sixty-eight million, eight hundred forty-eight thousand, nine hundred eighty-five".