729085161 has 24 divisors (see below), whose sum is σ = 1138449600. Its totient is φ = 413811552.

The previous prime is 729085139. The next prime is 729085199. The reversal of 729085161 is 161580927.

It is not a de Polignac number, because 729085161 - 2⁷ = 729085033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (729085061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5260 + ... + 38546.

It is an arithmetic number, because the mean of its divisors is an integer number (47435400).

Almost surely, 2^729085161 is an apocalyptic number.

It is an amenable number.

729085161 is a deficient number, since it is larger than the sum of its proper divisors (409364439).

729085161 is a wasteful number, since it uses less digits than its factorization.

729085161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33453 (or 33446 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 729085161 is about 27001.5770095008. The cubic root of 729085161 is about 900.0350443144.

The spelling of 729085161 in words is "seven hundred twenty-nine million, eighty-five thousand, one hundred sixty-one".