81018048 has 56 divisors (see below), whose sum is σ = 215026240. Its totient is φ = 26922240.

The previous prime is 81018019. The next prime is 81018053. The reversal of 81018048 is 84081018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109263 + ... + 110001.

Almost surely, 2^81018048 is an apocalyptic number.

It is an amenable number.

81018048 is an abundant number, since it is smaller than the sum of its proper divisors (134008192).

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

81018048 is a wasteful number, since it uses less digits than its factorization.

81018048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 81018048 is about 9001.0026108206. The cubic root of 81018048 is about 432.7070041629.

The spelling of 81018048 in words is "eighty-one million, eighteen thousand, forty-eight".