81360159 has 8 divisors (see below), whose sum is σ = 109199232. Its totient is φ = 53880600.

The previous prime is 81360127. The next prime is 81360161. The reversal of 81360159 is 95106318.

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

It is not a de Polignac number, because 81360159 - 2⁵ = 81360127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81360119) 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, 89349 + ... + 90254.

It is an arithmetic number, because the mean of its divisors is an integer number (13649904).

Almost surely, 2^81360159 is an apocalyptic number.

81360159 is a deficient number, since it is larger than the sum of its proper divisors (27839073).

81360159 is a wasteful number, since it uses less digits than its factorization.

81360159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179757.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 81360159 is about 9019.9866407883. The cubic root of 81360159 is about 433.3152058821.

The spelling of 81360159 in words is "eighty-one million, three hundred sixty thousand, one hundred fifty-nine".