81045159 has 8 divisors (see below), whose sum is σ = 116372592. Its totient is φ = 49873920.

The previous prime is 81045157. The next prime is 81045163. The reversal of 81045159 is 95154018.

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

It is not a de Polignac number, because 81045159 - 2¹ = 81045157 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81045157) 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, 1039002 + ... + 1039079.

It is an arithmetic number, because the mean of its divisors is an integer number (14546574).

Almost surely, 2^81045159 is an apocalyptic number.

81045159 is a deficient number, since it is larger than the sum of its proper divisors (35327433).

81045159 is a wasteful number, since it uses less digits than its factorization.

81045159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078097.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 81045159 is about 9002.5084837505. The cubic root of 81045159 is about 432.7552642382.

The spelling of 81045159 in words is "eighty-one million, forty-five thousand, one hundred fifty-nine".