81433811341 has 2 divisors, whose sum is σ = 81433811342. Its totient is φ = 81433811340.

The previous prime is 81433811243. The next prime is 81433811357. The reversal of 81433811341 is 14311833418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81236970441 + 196840900 = 285021^2 + 14030^2 .

It is a cyclic number.

It is not a de Polignac number, because 81433811341 - 2¹¹ = 81433809293 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81433811341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81433811141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40716905670 + 40716905671.

It is an arithmetic number, because the mean of its divisors is an integer number (40716905671).

Almost surely, 2^81433811341 is an apocalyptic number.

It is an amenable number.

81433811341 is a deficient number, since it is larger than the sum of its proper divisors (1).

81433811341 is an equidigital number, since it uses as much as digits as its factorization.

81433811341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The spelling of 81433811341 in words is "eighty-one billion, four hundred thirty-three million, eight hundred eleven thousand, three hundred forty-one".