81482864 has 20 divisors (see below), whose sum is σ = 158044200. Its totient is φ = 40697280.

The previous prime is 81482857. The next prime is 81482873. The reversal of 81482864 is 46828418.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16562 + ... + 20910.

It is an arithmetic number, because the mean of its divisors is an integer number (7902210).

Almost surely, 2^81482864 is an apocalyptic number.

It is an amenable number.

81482864 is a deficient number, since it is larger than the sum of its proper divisors (76561336).

81482864 is a wasteful number, since it uses less digits than its factorization.

81482864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5528 (or 5522 counting only the distinct ones).

The product of its digits is 98304, while the sum is 41.

The square root of 81482864 is about 9026.7859174792. The cubic root of 81482864 is about 433.5329342132.

The spelling of 81482864 in words is "eighty-one million, four hundred eighty-two thousand, eight hundred sixty-four".