19568074481 has 12 divisors (see below), whose sum is σ = 21161241780. Its totient is φ = 18071850720.

The previous prime is 19568074433. The next prime is 19568074577. The reversal of 19568074481 is 18447086591.

It can be written as a sum of positive squares in 2 ways, for example, as 16500687025 + 3067387456 = 128455^2 + 55384^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19568074481 is a prime.

It is a super-2 number, since 2×19568074481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19568074381) 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, 622430 + ... + 653111.

It is an arithmetic number, because the mean of its divisors is an integer number (1763436815).

Almost surely, 2^19568074481 is an apocalyptic number.

It is an amenable number.

19568074481 is a deficient number, since it is larger than the sum of its proper divisors (1593167299).

19568074481 is a wasteful number, since it uses less digits than its factorization.

19568074481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275616 (or 1275593 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 19568074481 in words is "nineteen billion, five hundred sixty-eight million, seventy-four thousand, four hundred eighty-one".