161135589 has 8 divisors (see below), whose sum is σ = 217567360. Its totient is φ = 106063776.

The previous prime is 161135581. The next prime is 161135591. The reversal of 161135589 is 985531161.

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

It is not a de Polignac number, because 161135589 - 2³ = 161135581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161135581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339712 + ... + 340185.

It is an arithmetic number, because the mean of its divisors is an integer number (27195920).

Almost surely, 2^161135589 is an apocalyptic number.

It is an amenable number.

161135589 is a deficient number, since it is larger than the sum of its proper divisors (56431771).

161135589 is an equidigital number, since it uses as much as digits as its factorization.

161135589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679979.

The product of its digits is 32400, while the sum is 39.

The square root of 161135589 is about 12693.9193711005. The cubic root of 161135589 is about 544.1648561871.

The spelling of 161135589 in words is "one hundred sixty-one million, one hundred thirty-five thousand, five hundred eighty-nine".