81085046 has 16 divisors (see below), whose sum is σ = 146319360. Its totient is φ = 32921640.

The previous prime is 81085033. The next prime is 81085061. The reversal of 81085046 is 64058018.

It is a super-3 number, since 3×81085046³ (a number of 25 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 152150 + ... + 152681.

It is an arithmetic number, because the mean of its divisors is an integer number (9144960).

Almost surely, 2^81085046 is an apocalyptic number.

81085046 is a deficient number, since it is larger than the sum of its proper divisors (65234314).

81085046 is a wasteful number, since it uses less digits than its factorization.

81085046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304859.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 81085046 is about 9004.7235382326. The cubic root of 81085046 is about 432.8262472081.

The spelling of 81085046 in words is "eighty-one million, eighty-five thousand, forty-six".