81344844318 has 64 divisors (see below), whose sum is σ = 168476216832. Its totient is φ = 26170404480.

The previous prime is 81344844281. The next prime is 81344844337.

81344844318 is nontrivially palindromic in base 10.

It is a congruent number.

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, 6442980 + ... + 6455592.

It is an arithmetic number, because the mean of its divisors is an integer number (2632440888).

Almost surely, 2^81344844318 is an apocalyptic number.

81344844318 is an abundant number, since it is smaller than the sum of its proper divisors (87131372514).

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

81344844318 is a wasteful number, since it uses less digits than its factorization.

81344844318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13009.

The product of its digits is 1179648, while the sum is 48.

The spelling of 81344844318 in words is "eighty-one billion, three hundred forty-four million, eight hundred forty-four thousand, three hundred eighteen".