81474175411 has 2 divisors, whose sum is σ = 81474175412. Its totient is φ = 81474175410.

The previous prime is 81474175403. The next prime is 81474175459. The reversal of 81474175411 is 11457147418.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81474175411 - 2³ = 81474175403 is a prime.

It is not a weakly prime, because it can be changed into another prime (81474170411) 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, 40737087705 + 40737087706.

It is an arithmetic number, because the mean of its divisors is an integer number (40737087706).

Almost surely, 2^81474175411 is an apocalyptic number.

81474175411 is a deficient number, since it is larger than the sum of its proper divisors (1).

81474175411 is an equidigital number, since it uses as much as digits as its factorization.

81474175411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125440, while the sum is 43.

The spelling of 81474175411 in words is "eighty-one billion, four hundred seventy-four million, one hundred seventy-five thousand, four hundred eleven".