81484578696 has 128 divisors (see below), whose sum is σ = 209144073600. Its totient is φ = 26448660480.

The previous prime is 81484578689. The next prime is 81484578701. The reversal of 81484578696 is 69687548418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81729270 + ... + 81730266.

It is an arithmetic number, because the mean of its divisors is an integer number (1633938075).

Almost surely, 2^81484578696 is an apocalyptic number.

It is an amenable number.

81484578696 is an abundant number, since it is smaller than the sum of its proper divisors (127659494904).

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

81484578696 is a wasteful number, since it uses less digits than its factorization.

81484578696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639 (or 1635 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 66.

The spelling of 81484578696 in words is "eighty-one billion, four hundred eighty-four million, five hundred seventy-eight thousand, six hundred ninety-six".