81441214418 has 16 divisors (see below), whose sum is σ = 129268607616. Its totient is φ = 38401550880.

The previous prime is 81441214381. The next prime is 81441214427.

81441214418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12464771 + ... + 12471302.

It is an arithmetic number, because the mean of its divisors is an integer number (8079287976).

Almost surely, 2^81441214418 is an apocalyptic number.

81441214418 is a deficient number, since it is larger than the sum of its proper divisors (47827393198).

81441214418 is a wasteful number, since it uses less digits than its factorization.

81441214418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24936169.

The product of its digits is 32768, while the sum is 38.

The spelling of 81441214418 in words is "eighty-one billion, four hundred forty-one million, two hundred fourteen thousand, four hundred eighteen".