81886125583 has 2 divisors, whose sum is σ = 81886125584. Its totient is φ = 81886125582.

The previous prime is 81886125569. The next prime is 81886125689. The reversal of 81886125583 is 38552168818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81886125583 - 2¹⁷ = 81885994511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81886125523) 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, 40943062791 + 40943062792.

It is an arithmetic number, because the mean of its divisors is an integer number (40943062792).

Almost surely, 2^81886125583 is an apocalyptic number.

81886125583 is a deficient number, since it is larger than the sum of its proper divisors (1).

81886125583 is an equidigital number, since it uses as much as digits as its factorization.

81886125583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3686400, while the sum is 55.

The spelling of 81886125583 in words is "eighty-one billion, eight hundred eighty-six million, one hundred twenty-five thousand, five hundred eighty-three".