81589650306 has 8 divisors (see below), whose sum is σ = 163179300624. Its totient is φ = 27196550100.

The previous prime is 81589650301. The next prime is 81589650319. The reversal of 81589650306 is 60305698518.

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

81589650306 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (81589650301) 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, 6799137520 + ... + 6799137531.

It is an arithmetic number, because the mean of its divisors is an integer number (20397412578).

Almost surely, 2^81589650306 is an apocalyptic number.

81589650306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81589650306 is a wasteful number, since it uses less digits than its factorization.

81589650306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13598275056.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 81589650306 in words is "eighty-one billion, five hundred eighty-nine million, six hundred fifty thousand, three hundred six".