164441643 has 8 divisors (see below), whose sum is σ = 220652688. Its totient is φ = 108929184.

The previous prime is 164441633. The next prime is 164441647. The reversal of 164441643 is 346144461.

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

It is not a de Polignac number, because 164441643 - 2²⁴ = 147664427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (164441647) 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, 174096 + ... + 175037.

It is an arithmetic number, because the mean of its divisors is an integer number (27581586).

Almost surely, 2^164441643 is an apocalyptic number.

164441643 is a deficient number, since it is larger than the sum of its proper divisors (56211045).

164441643 is a wasteful number, since it uses less digits than its factorization.

164441643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349293.

The product of its digits is 27648, while the sum is 33.

The square root of 164441643 is about 12823.4801438611. The cubic root of 164441643 is about 547.8612732028.

The spelling of 164441643 in words is "one hundred sixty-four million, four hundred forty-one thousand, six hundred forty-three".