81472533527418 has 64 divisors (see below), whose sum is σ = 183962399685120. Its totient is φ = 23827650033600.

The previous prime is 81472533527401. The next prime is 81472533527423.

81472533527418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3905368 + ... + 13349043.

It is an arithmetic number, because the mean of its divisors is an integer number (2874412495080).

Almost surely, 2^{81472533527418} is an apocalyptic number.

81472533527418 is an abundant number, since it is smaller than the sum of its proper divisors (102489866157702).

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

81472533527418 is a wasteful number, since it uses less digits than its factorization.

81472533527418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17256923.

The product of its digits is 45158400, while the sum is 60.

The spelling of 81472533527418 in words is "eighty-one trillion, four hundred seventy-two billion, five hundred thirty-three million, five hundred twenty-seven thousand, four hundred eighteen".