81063582 has 16 divisors (see below), whose sum is σ = 171664272. Its totient is φ = 25431680.

The previous prime is 81063547. The next prime is 81063607. The reversal of 81063582 is 28536018.

It is a happy number.

It is a congruent number.

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, 397269 + ... + 397472.

It is an arithmetic number, because the mean of its divisors is an integer number (10729017).

Almost surely, 2^81063582 is an apocalyptic number.

81063582 is an abundant number, since it is smaller than the sum of its proper divisors (90600690).

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

81063582 is a wasteful number, since it uses less digits than its factorization.

81063582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794763.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 81063582 is about 9003.5316404176. The cubic root of 81063582 is about 432.7880527325.

The spelling of 81063582 in words is "eighty-one million, sixty-three thousand, five hundred eighty-two".