9965613842 has 6 divisors (see below), whose sum is σ = 14948632533. Its totient is φ = 4982736332.

The previous prime is 9965613817. The next prime is 9965613851. The reversal of 9965613842 is 2483165699.

9965613842 is digitally balanced in base 5, 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 2 ways, for example, as 9291224881 + 674388961 = 96391^2 + 25969^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=70589.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 105884 + ... + 176472.

Almost surely, 2^9965613842 is an apocalyptic number.

9965613842 is a deficient number, since it is larger than the sum of its proper divisors (4983018691).

9965613842 is an frugal number, since it uses more digits than its factorization.

9965613842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141180 (or 70591 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 53.

The square root of 9965613842 is about 99827.9211543544. The cubic root of 9965613842 is about 2151.9624297567.

The spelling of 9965613842 in words is "nine billion, nine hundred sixty-five million, six hundred thirteen thousand, eight hundred forty-two".