16391531833 has 2 divisors, whose sum is σ = 16391531834. Its totient is φ = 16391531832.

The previous prime is 16391531813. The next prime is 16391531837. The reversal of 16391531833 is 33813519361.

16391531833 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., 16223881129 + 167650704 = 127373^2 + 12948^2 .

It is a cyclic number.

It is not a de Polignac number, because 16391531833 - 2³³ = 7801597241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16391531833.

It is not a weakly prime, because it can be changed into another prime (16391531837) 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, 8195765916 + 8195765917.

It is an arithmetic number, because the mean of its divisors is an integer number (8195765917).

Almost surely, 2^16391531833 is an apocalyptic number.

It is an amenable number.

16391531833 is a deficient number, since it is larger than the sum of its proper divisors (1).

16391531833 is an equidigital number, since it uses as much as digits as its factorization.

16391531833 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The spelling of 16391531833 in words is "sixteen billion, three hundred ninety-one million, five hundred thirty-one thousand, eight hundred thirty-three".