16033781233 has 4 divisors (see below), whose sum is σ = 16034812020. Its totient is φ = 16032750448.

The previous prime is 16033781227. The next prime is 16033781249. The reversal of 16033781233 is 33218733061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13230290529 + 2803490704 = 115023^2 + 52948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16033781233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16033781192 and 16033781201.

It is not an unprimeable number, because it can be changed into a prime (16033181233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491698 + ... + 523291.

It is an arithmetic number, because the mean of its divisors is an integer number (4008703005).

Almost surely, 2^16033781233 is an apocalyptic number.

It is an amenable number.

16033781233 is a deficient number, since it is larger than the sum of its proper divisors (1030787).

16033781233 is a wasteful number, since it uses less digits than its factorization.

16033781233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030786.

The product of its (nonzero) digits is 54432, while the sum is 37.

The spelling of 16033781233 in words is "sixteen billion, thirty-three million, seven hundred eighty-one thousand, two hundred thirty-three".