81008876 has 24 divisors (see below), whose sum is σ = 161652960. Its totient is φ = 35188992.

The previous prime is 81008869. The next prime is 81008887. The reversal of 81008876 is 67880018.

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, 44936 + ... + 46703.

It is an arithmetic number, because the mean of its divisors is an integer number (6735540).

Almost surely, 2^81008876 is an apocalyptic number.

It is an amenable number.

81008876 is a deficient number, since it is larger than the sum of its proper divisors (80644084).

81008876 is a wasteful number, since it uses less digits than its factorization.

81008876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91673 (or 91671 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 81008876 is about 9000.4930976030. The cubic root of 81008876 is about 432.6906747214.

The spelling of 81008876 in words is "eighty-one million, eight thousand, eight hundred seventy-six".