81040174 has 8 divisors (see below), whose sum is σ = 121613400. Its totient is φ = 40502376.

The previous prime is 81040171. The next prime is 81040189. The reversal of 81040174 is 47104018.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81040171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2109 + ... + 12904.

It is an arithmetic number, because the mean of its divisors is an integer number (15201675).

Almost surely, 2^81040174 is an apocalyptic number.

81040174 is a deficient number, since it is larger than the sum of its proper divisors (40573226).

81040174 is a wasteful number, since it uses less digits than its factorization.

81040174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17714.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 81040174 is about 9002.2316122171. The cubic root of 81040174 is about 432.7463912870.

The spelling of 81040174 in words is "eighty-one million, forty thousand, one hundred seventy-four".