81589141617 has 8 divisors (see below), whose sum is σ = 108874915296. Its totient is φ = 54348064512.

The previous prime is 81589141597. The next prime is 81589141619. The reversal of 81589141617 is 71614198518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81589141617 - 2³⁰ = 80515399793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81589141617.

It is not an unprimeable number, because it can be changed into a prime (81589141619) 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 7 ways as a sum of consecutive naturals, for example, 11169883 + ... + 11177184.

It is an arithmetic number, because the mean of its divisors is an integer number (13609364412).

Almost surely, 2^81589141617 is an apocalyptic number.

It is an amenable number.

81589141617 is a deficient number, since it is larger than the sum of its proper divisors (27285773679).

81589141617 is a wasteful number, since it uses less digits than its factorization.

81589141617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22348287.

The product of its digits is 483840, while the sum is 51.

The spelling of 81589141617 in words is "eighty-one billion, five hundred eighty-nine million, one hundred forty-one thousand, six hundred seventeen".