164561143 has 8 divisors (see below), whose sum is σ = 166896288. Its totient is φ = 162240384.

The previous prime is 164561141. The next prime is 164561161. The reversal of 164561143 is 341165461.

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

It is a cyclic number.

It is not a de Polignac number, because 164561143 - 2¹ = 164561141 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 (164561141) 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, 20571 + ... + 27427.

It is an arithmetic number, because the mean of its divisors is an integer number (20862036).

Almost surely, 2^164561143 is an apocalyptic number.

164561143 is a deficient number, since it is larger than the sum of its proper divisors (2335145).

164561143 is a wasteful number, since it uses less digits than its factorization.

164561143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7193.

The product of its digits is 8640, while the sum is 31.

The square root of 164561143 is about 12828.1387192375. The cubic root of 164561143 is about 547.9939516178.

The spelling of 164561143 in words is "one hundred sixty-four million, five hundred sixty-one thousand, one hundred forty-three".