9431321819481 has 6 divisors (see below), whose sum is σ = 13623020405930. Its totient is φ = 6287547879648.

The previous prime is 9431321819449. The next prime is 9431321819483. The reversal of 9431321819481 is 1849181231349.

9431321819481 is a `hidden beast` number, since 9 + 4 + 3 + 132 + 18 + 19 + 481 = 666.

9431321819481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6279489703881 + 3151832115600 = 2505891^2 + 1775340^2 .

It is not a de Polignac number, because 9431321819481 - 2⁵ = 9431321819449 is a prime.

It is a super-2 number, since 2×9431321819481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9431321819483) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 523962323296 + ... + 523962323313.

Almost surely, 2^{9431321819481} is an apocalyptic number.

It is an amenable number.

9431321819481 is a deficient number, since it is larger than the sum of its proper divisors (4191698586449).

9431321819481 is a wasteful number, since it uses less digits than its factorization.

9431321819481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047924646615 (or 1047924646612 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The spelling of 9431321819481 in words is "nine trillion, four hundred thirty-one billion, three hundred twenty-one million, eight hundred nineteen thousand, four hundred eighty-one".