81232867009 has 8 divisors (see below), whose sum is σ = 96873978240. Its totient is φ = 66600859776.

The previous prime is 81232866973. The next prime is 81232867043. The reversal of 81232867009 is 90076823218.

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 81232867009 - 2²¹ = 81230769857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81232867009.

It is not an unprimeable number, because it can be changed into a prime (81232867109) 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, 252275824 + ... + 252276145.

It is an arithmetic number, because the mean of its divisors is an integer number (12109247280).

Almost surely, 2^81232867009 is an apocalyptic number.

It is an amenable number.

81232867009 is a deficient number, since it is larger than the sum of its proper divisors (15641111231).

81232867009 is a wasteful number, since it uses less digits than its factorization.

81232867009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504551999.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 81232867009 in words is "eighty-one billion, two hundred thirty-two million, eight hundred sixty-seven thousand, nine".