81875308589 has 8 divisors (see below), whose sum is σ = 82613224512. Its totient is φ = 81137627200.

The previous prime is 81875308547. The next prime is 81875308601. The reversal of 81875308589 is 98580357818.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 81875308589 - 2¹² = 81875304493 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 (81875308789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684962 + ... + 795564.

It is an arithmetic number, because the mean of its divisors is an integer number (10326653064).

Almost surely, 2^81875308589 is an apocalyptic number.

It is an amenable number.

81875308589 is a deficient number, since it is larger than the sum of its proper divisors (737915923).

81875308589 is a wasteful number, since it uses less digits than its factorization.

81875308589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117267.

The product of its (nonzero) digits is 19353600, while the sum is 62.

The spelling of 81875308589 in words is "eighty-one billion, eight hundred seventy-five million, three hundred eight thousand, five hundred eighty-nine".