9919010811 has 4 divisors (see below), whose sum is σ = 13225347752. Its totient is φ = 6612673872.

The previous prime is 9919010789. The next prime is 9919010831. The reversal of 9919010811 is 1180109199.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1180109199 = 3 ⋅393369733.

It is not a de Polignac number, because 9919010811 - 2¹³ = 9919002619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9919010811.

It is not an unprimeable number, because it can be changed into a prime (9919010831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653168466 + ... + 1653168471.

It is an arithmetic number, because the mean of its divisors is an integer number (3306336938).

Almost surely, 2^9919010811 is an apocalyptic number.

9919010811 is a deficient number, since it is larger than the sum of its proper divisors (3306336941).

9919010811 is a wasteful number, since it uses less digits than its factorization.

9919010811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306336940.

The product of its (nonzero) digits is 5832, while the sum is 39.

The square root of 9919010811 is about 99594.2308118297. The cubic root of 9919010811 is about 2148.6027200869.

The spelling of 9919010811 in words is "nine billion, nine hundred nineteen million, ten thousand, eight hundred eleven".