181691332883 has 2 divisors, whose sum is σ = 181691332884. Its totient is φ = 181691332882.

The previous prime is 181691332861. The next prime is 181691332891. The reversal of 181691332883 is 388233196181.

181691332883 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 is a cyclic number.

It is not a de Polignac number, because 181691332883 - 2¹⁶ = 181691267347 is a prime.

It is a super-2 number, since 2×181691332883² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (181691335883) 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 as a sum of consecutive naturals, namely, 90845666441 + 90845666442.

It is an arithmetic number, because the mean of its divisors is an integer number (90845666442).

Almost surely, 2^181691332883 is an apocalyptic number.

181691332883 is a deficient number, since it is larger than the sum of its proper divisors (1).

181691332883 is an equidigital number, since it uses as much as digits as its factorization.

181691332883 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 53.

The spelling of 181691332883 in words is "one hundred eighty-one billion, six hundred ninety-one million, three hundred thirty-two thousand, eight hundred eighty-three".