11661854033 has 2 divisors, whose sum is σ = 11661854034. Its totient is φ = 11661854032.

The previous prime is 11661853999. The next prime is 11661854063. The reversal of 11661854033 is 33045816611.

11661854033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5835890449 + 5825963584 = 76393^2 + 76328^2 .

It is a cyclic number.

It is not a de Polignac number, because 11661854033 - 2¹⁰ = 11661853009 is a prime.

It is not a weakly prime, because it can be changed into another prime (11661854063) 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 as a sum of consecutive naturals, namely, 5830927016 + 5830927017.

It is an arithmetic number, because the mean of its divisors is an integer number (5830927017).

Almost surely, 2^11661854033 is an apocalyptic number.

It is an amenable number.

11661854033 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661854033 is an equidigital number, since it uses as much as digits as its factorization.

11661854033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 11661854033 in words is "eleven billion, six hundred sixty-one million, eight hundred fifty-four thousand, thirty-three".