81969096918 has 8 divisors (see below), whose sum is σ = 163938193848. Its totient is φ = 27323032304.

The previous prime is 81969096863. The next prime is 81969096931.

81969096918 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

81969096918 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6830758071 + ... + 6830758082.

It is an arithmetic number, because the mean of its divisors is an integer number (20492274231).

Almost surely, 2^81969096918 is an apocalyptic number.

81969096918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81969096918 is a wasteful number, since it uses less digits than its factorization.

81969096918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13661516158.

The product of its (nonzero) digits is 15116544, while the sum is 66.

The spelling of 81969096918 in words is "eighty-one billion, nine hundred sixty-nine million, ninety-six thousand, nine hundred eighteen".