81044169 has 8 divisors (see below), whose sum is σ = 108152832. Its totient is φ = 53982480.

The previous prime is 81044153. The next prime is 81044189. The reversal of 81044169 is 96144018.

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

It is not a de Polignac number, because 81044169 - 2⁴ = 81044153 is a prime.

It is a super-2 number, since 2×81044169² = 13136314657801122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81044129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7497 + ... + 14774.

It is an arithmetic number, because the mean of its divisors is an integer number (13519104).

Almost surely, 2^81044169 is an apocalyptic number.

It is an amenable number.

81044169 is a deficient number, since it is larger than the sum of its proper divisors (27108663).

81044169 is a wasteful number, since it uses less digits than its factorization.

81044169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23487.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 81044169 is about 9002.4534989080. The cubic root of 81044169 is about 432.7535021365.

The spelling of 81044169 in words is "eighty-one million, forty-four thousand, one hundred sixty-nine".