81063364 has 12 divisors (see below), whose sum is σ = 142272144. Its totient is φ = 40414184.

The previous prime is 81063349. The next prime is 81063371. The reversal of 81063364 is 46336018.

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, 27814 + ... + 30589.

It is an arithmetic number, because the mean of its divisors is an integer number (11856012).

Almost surely, 2^81063364 is an apocalyptic number.

It is an amenable number.

81063364 is a deficient number, since it is larger than the sum of its proper divisors (61208780).

81063364 is a wasteful number, since it uses less digits than its factorization.

81063364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58754 (or 58752 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 81063364 is about 9003.5195340489. The cubic root of 81063364 is about 432.7876647742.

The spelling of 81063364 in words is "eighty-one million, sixty-three thousand, three hundred sixty-four".