81480076896 has 48 divisors (see below), whose sum is σ = 221260561200. Its totient is φ = 26223472128.

The previous prime is 81480076877. The next prime is 81480076939. The reversal of 81480076896 is 69867008418.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14630851 + ... + 14636418.

It is an arithmetic number, because the mean of its divisors is an integer number (4609595025).

Almost surely, 2^81480076896 is an apocalyptic number.

It is an amenable number.

81480076896 is an abundant number, since it is smaller than the sum of its proper divisors (139780484304).

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

81480076896 is a wasteful number, since it uses less digits than its factorization.

81480076896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29267311 (or 29267303 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 81480076896 in words is "eighty-one billion, four hundred eighty million, seventy-six thousand, eight hundred ninety-six".