81046146 has 16 divisors (see below), whose sum is σ = 162337824. Its totient is φ = 26974464.

The previous prime is 81046139. The next prime is 81046151. The reversal of 81046146 is 64164018.

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, 5791 + ... + 13986.

It is an arithmetic number, because the mean of its divisors is an integer number (10146114).

Almost surely, 2^81046146 is an apocalyptic number.

81046146 is an abundant number, since it is smaller than the sum of its proper divisors (81291678).

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

81046146 is a wasteful number, since it uses less digits than its factorization.

81046146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20465.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 81046146 is about 9002.5633016380. The cubic root of 81046146 is about 432.7570209860.

The spelling of 81046146 in words is "eighty-one million, forty-six thousand, one hundred forty-six".