81746482017 has 4 divisors (see below), whose sum is σ = 108995309360. Its totient is φ = 54497654676.

The previous prime is 81746481977. The next prime is 81746482067. The reversal of 81746482017 is 71028464718.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 81746482017 - 2²² = 81742287713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81746482067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13624413667 + ... + 13624413672.

It is an arithmetic number, because the mean of its divisors is an integer number (27248827340).

Almost surely, 2^81746482017 is an apocalyptic number.

It is an amenable number.

81746482017 is a deficient number, since it is larger than the sum of its proper divisors (27248827343).

81746482017 is a wasteful number, since it uses less digits than its factorization.

81746482017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27248827342.

The product of its (nonzero) digits is 602112, while the sum is 48.

The spelling of 81746482017 in words is "eighty-one billion, seven hundred forty-six million, four hundred eighty-two thousand, seventeen".