81690802283 has 2 divisors, whose sum is σ = 81690802284. Its totient is φ = 81690802282.

The previous prime is 81690802261. The next prime is 81690802289. The reversal of 81690802283 is 38220809618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81690802283 - 2²⁴ = 81674025067 is a prime.

It is not a weakly prime, because it can be changed into another prime (81690802289) 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, 40845401141 + 40845401142.

It is an arithmetic number, because the mean of its divisors is an integer number (40845401142).

Almost surely, 2^81690802283 is an apocalyptic number.

81690802283 is a deficient number, since it is larger than the sum of its proper divisors (1).

81690802283 is an equidigital number, since it uses as much as digits as its factorization.

81690802283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 81690802283 in words is "eighty-one billion, six hundred ninety million, eight hundred two thousand, two hundred eighty-three".