9640119581 has 2 divisors, whose sum is σ = 9640119582. Its totient is φ = 9640119580.

The previous prime is 9640119571. The next prime is 9640119653. The reversal of 9640119581 is 1859110469.

9640119581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8880235225 + 759884356 = 94235^2 + 27566^2 .

It is a cyclic number.

It is not a de Polignac number, because 9640119581 - 2¹⁰ = 9640118557 is a prime.

It is a super-2 number, since 2×9640119581² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9640119551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820059790 + 4820059791.

It is an arithmetic number, because the mean of its divisors is an integer number (4820059791).

Almost surely, 2^9640119581 is an apocalyptic number.

It is an amenable number.

9640119581 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640119581 is an equidigital number, since it uses as much as digits as its factorization.

9640119581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 9640119581 is about 98184.1106340532. The cubic root of 9640119581 is about 2128.2736775284.

The spelling of 9640119581 in words is "nine billion, six hundred forty million, one hundred nineteen thousand, five hundred eighty-one".