9911806233523 has 16 divisors (see below), whose sum is σ = 9989860608000. Its totient is φ = 9834059602080.

The previous prime is 9911806233473. The next prime is 9911806233533. The reversal of 9911806233523 is 3253326081199.

It is a cyclic number.

It is not a de Polignac number, because 9911806233523 - 2⁹ = 9911806233011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9911806233533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333054318 + ... + 333084076.

It is an arithmetic number, because the mean of its divisors is an integer number (624366288000).

Almost surely, 2^{9911806233523} is an apocalyptic number.

9911806233523 is a deficient number, since it is larger than the sum of its proper divisors (78054374477).

9911806233523 is a wasteful number, since it uses less digits than its factorization.

9911806233523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34842.

The product of its (nonzero) digits is 2099520, while the sum is 52.

The spelling of 9911806233523 in words is "nine trillion, nine hundred eleven billion, eight hundred six million, two hundred thirty-three thousand, five hundred twenty-three".