81105058 has 8 divisors (see below), whose sum is σ = 123719760. Its totient is φ = 39865140.

The previous prime is 81105029. The next prime is 81105103. The reversal of 81105058 is 85050118.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 343548 + ... + 343783.

It is an arithmetic number, because the mean of its divisors is an integer number (15464970).

Almost surely, 2^81105058 is an apocalyptic number.

81105058 is a deficient number, since it is larger than the sum of its proper divisors (42614702).

81105058 is a wasteful number, since it uses less digits than its factorization.

81105058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687392.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 81105058 is about 9005.8346642607. The cubic root of 81105058 is about 432.8618518266.

The spelling of 81105058 in words is "eighty-one million, one hundred five thousand, fifty-eight".