81360908 has 12 divisors (see below), whose sum is σ = 142542960. Its totient is φ = 40634352.

The previous prime is 81360893. The next prime is 81360911. The reversal of 81360908 is 80906318.

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, 7391 + ... + 14742.

It is an arithmetic number, because the mean of its divisors is an integer number (11878580).

Almost surely, 2^81360908 is an apocalyptic number.

It is an amenable number.

81360908 is a deficient number, since it is larger than the sum of its proper divisors (61182052).

81360908 is a wasteful number, since it uses less digits than its factorization.

81360908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23056 (or 23054 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 81360908 is about 9020.0281596013. The cubic root of 81360908 is about 433.3165355750.

The spelling of 81360908 in words is "eighty-one million, three hundred sixty thousand, nine hundred eight".