81548328896 has 28 divisors (see below), whose sum is σ = 162339509712. Its totient is φ = 40643885568.

The previous prime is 81548328887. The next prime is 81548328907. The reversal of 81548328896 is 69882384518.

It is a congruent number.

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, 2015420 + ... + 2055483.

Almost surely, 2^81548328896 is an apocalyptic number.

It is an amenable number.

81548328896 is a deficient number, since it is larger than the sum of its proper divisors (80791180816).

81548328896 is a wasteful number, since it uses less digits than its factorization.

81548328896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071228 (or 4071218 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The spelling of 81548328896 in words is "eighty-one billion, five hundred forty-eight million, three hundred twenty-eight thousand, eight hundred ninety-six".