9911806233533 has 2 divisors, whose sum is σ = 9911806233534. Its totient is φ = 9911806233532.

The previous prime is 9911806233473. The next prime is 9911806233607. The reversal of 9911806233533 is 3353326081199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5624662059769 + 4287144173764 = 2371637^2 + 2070542^2 .

It is a cyclic number.

It is not a de Polignac number, because 9911806233533 - 2¹⁰ = 9911806232509 is a prime.

It is a super-2 number, since 2×9911806233533² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9911806230533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955903116766 + 4955903116767.

It is an arithmetic number, because the mean of its divisors is an integer number (4955903116767).

Almost surely, 2^{9911806233533} is an apocalyptic number.

It is an amenable number.

9911806233533 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911806233533 is an equidigital number, since it uses as much as digits as its factorization.

9911806233533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3149280, while the sum is 53.

The spelling of 9911806233533 in words is "nine trillion, nine hundred eleven billion, eight hundred six million, two hundred thirty-three thousand, five hundred thirty-three".