81452915166 has 32 divisors (see below), whose sum is σ = 188269989120. Its totient is φ = 23010774336.

The previous prime is 81452915101. The next prime is 81452915179. The reversal of 81452915166 is 66151925418.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10891516 + ... + 10898991.

It is an arithmetic number, because the mean of its divisors is an integer number (5883437160).

Almost surely, 2^81452915166 is an apocalyptic number.

81452915166 is an abundant number, since it is smaller than the sum of its proper divisors (106817073954).

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

81452915166 is a wasteful number, since it uses less digits than its factorization.

81452915166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21790608.

The product of its digits is 518400, while the sum is 48.

The spelling of 81452915166 in words is "eighty-one billion, four hundred fifty-two million, nine hundred fifteen thousand, one hundred sixty-six".