81886141727 has 24 divisors (see below), whose sum is σ = 93876584400. Its totient is φ = 71194526208.

The previous prime is 81886141723. The next prime is 81886141747. The reversal of 81886141727 is 72714168818.

It is not a de Polignac number, because 81886141727 - 2² = 81886141723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81886141723) 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 in 23 ways as a sum of consecutive naturals, for example, 481799 + ... + 629207.

It is an arithmetic number, because the mean of its divisors is an integer number (3911524350).

Almost surely, 2^81886141727 is an apocalyptic number.

81886141727 is a deficient number, since it is larger than the sum of its proper divisors (11990442673).

81886141727 is a wasteful number, since it uses less digits than its factorization.

81886141727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147627 (or 147614 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 53.

The spelling of 81886141727 in words is "eighty-one billion, eight hundred eighty-six million, one hundred forty-one thousand, seven hundred twenty-seven".