81760897696 has 24 divisors (see below), whose sum is σ = 164391595200. Its totient is φ = 40010651328.

The previous prime is 81760897597. The next prime is 81760897709. The reversal of 81760897696 is 69679806718.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27179646 + ... + 27182653.

It is an arithmetic number, because the mean of its divisors is an integer number (6849649800).

Almost surely, 2^81760897696 is an apocalyptic number.

It is an amenable number.

81760897696 is an abundant number, since it is smaller than the sum of its proper divisors (82630697504).

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

81760897696 is a wasteful number, since it uses less digits than its factorization.

81760897696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54362356 (or 54362348 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 81760897696 in words is "eighty-one billion, seven hundred sixty million, eight hundred ninety-seven thousand, six hundred ninety-six".