9920065911 has 32 divisors (see below), whose sum is σ = 15270689280. Its totient is φ = 5610819456.

The previous prime is 9920065847. The next prime is 9920065933. The reversal of 9920065911 is 1195600299.

It is a happy number.

9920065911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9920065911 - 2⁶ = 9920065847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920064911) 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 in 31 ways as a sum of consecutive naturals, for example, 3264885 + ... + 3267921.

It is an arithmetic number, because the mean of its divisors is an integer number (477209040).

Almost surely, 2^9920065911 is an apocalyptic number.

9920065911 is a deficient number, since it is larger than the sum of its proper divisors (5350623369).

9920065911 is a wasteful number, since it uses less digits than its factorization.

9920065911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583.

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 9920065911 is about 99599.5276645427. The cubic root of 9920065911 is about 2148.6789007463.

The spelling of 9920065911 in words is "nine billion, nine hundred twenty million, sixty-five thousand, nine hundred eleven".