9718919811 has 8 divisors (see below), whose sum is σ = 14398399760. Its totient is φ = 6479279856.

The previous prime is 9718919797. The next prime is 9718919857. The reversal of 9718919811 is 1189198179.

It is not a de Polignac number, because 9718919811 - 2¹⁸ = 9718657667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9718919411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179979970 + ... + 179980023.

It is an arithmetic number, because the mean of its divisors is an integer number (1799799970).

Almost surely, 2^9718919811 is an apocalyptic number.

9718919811 is a deficient number, since it is larger than the sum of its proper divisors (4679479949).

9718919811 is a wasteful number, since it uses less digits than its factorization.

9718919811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359960002 (or 359959996 counting only the distinct ones).

The product of its digits is 326592, while the sum is 54.

The square root of 9718919811 is about 98584.5820146335. The cubic root of 9718919811 is about 2134.0569238596.

The spelling of 9718919811 in words is "nine billion, seven hundred eighteen million, nine hundred nineteen thousand, eight hundred eleven".