81843164115 has 32 divisors (see below), whose sum is σ = 133412538432. Its totient is φ = 42831936000.

The previous prime is 81843164093. The next prime is 81843164129. The reversal of 81843164115 is 51146134818.

It is not a de Polignac number, because 81843164115 - 2⁸ = 81843163859 is a prime.

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, 278985 + ... + 491445.

It is an arithmetic number, because the mean of its divisors is an integer number (4169141826).

Almost surely, 2^81843164115 is an apocalyptic number.

81843164115 is a deficient number, since it is larger than the sum of its proper divisors (51569374317).

81843164115 is a wasteful number, since it uses less digits than its factorization.

81843164115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212951.

The product of its digits is 92160, while the sum is 42.

The spelling of 81843164115 in words is "eighty-one billion, eight hundred forty-three million, one hundred sixty-four thousand, one hundred fifteen".