81682234404 has 12 divisors (see below), whose sum is σ = 190591880304. Its totient is φ = 27227411464.

The previous prime is 81682234399. The next prime is 81682234453. The reversal of 81682234404 is 40443228618.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3403426422 + ... + 3403426445.

It is an arithmetic number, because the mean of its divisors is an integer number (15882656692).

Almost surely, 2^81682234404 is an apocalyptic number.

It is an amenable number.

81682234404 is an abundant number, since it is smaller than the sum of its proper divisors (108909645900).

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

81682234404 is a wasteful number, since it uses less digits than its factorization.

81682234404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6806852874 (or 6806852872 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 42.

The spelling of 81682234404 in words is "eighty-one billion, six hundred eighty-two million, two hundred thirty-four thousand, four hundred four".