81241194323 has 2 divisors, whose sum is σ = 81241194324. Its totient is φ = 81241194322.

The previous prime is 81241194317. The next prime is 81241194337. The reversal of 81241194323 is 32349114218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81241194323 - 2¹² = 81241190227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (81241194373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40620597161 + 40620597162.

It is an arithmetic number, because the mean of its divisors is an integer number (40620597162).

Almost surely, 2^81241194323 is an apocalyptic number.

81241194323 is a deficient number, since it is larger than the sum of its proper divisors (1).

81241194323 is an equidigital number, since it uses as much as digits as its factorization.

81241194323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The spelling of 81241194323 in words is "eighty-one billion, two hundred forty-one million, one hundred ninety-four thousand, three hundred twenty-three".