81419776411 has 2 divisors, whose sum is σ = 81419776412. Its totient is φ = 81419776410.

The previous prime is 81419776409. The next prime is 81419776469. The reversal of 81419776411 is 11467791418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81419776411 - 2¹ = 81419776409 is a prime.

Together with 81419776409, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81419776811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40709888205 + 40709888206.

It is an arithmetic number, because the mean of its divisors is an integer number (40709888206).

Almost surely, 2^81419776411 is an apocalyptic number.

81419776411 is a deficient number, since it is larger than the sum of its proper divisors (1).

81419776411 is an equidigital number, since it uses as much as digits as its factorization.

81419776411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 49.

The spelling of 81419776411 in words is "eighty-one billion, four hundred nineteen million, seven hundred seventy-six thousand, four hundred eleven".