164444345 has 8 divisors (see below), whose sum is σ = 212512776. Its totient is φ = 121435776.

The previous prime is 164444339. The next prime is 164444351. The reversal of 164444345 is 543444461.

It is an interprime number because it is at equal distance from previous prime (164444339) and next prime (164444351).

It can be written as a sum of positive squares in 4 ways, for example, as 19386409 + 145057936 = 4403^2 + 12044^2 .

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 164444345 - 2²⁰ = 163395769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1264892 + ... + 1265021.

It is an arithmetic number, because the mean of its divisors is an integer number (26564097).

Almost surely, 2^164444345 is an apocalyptic number.

It is an amenable number.

164444345 is a deficient number, since it is larger than the sum of its proper divisors (48068431).

164444345 is a wasteful number, since it uses less digits than its factorization.

164444345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529931.

The product of its digits is 92160, while the sum is 35.

The square root of 164444345 is about 12823.5854970441. The cubic root of 164444345 is about 547.8642738885.

The spelling of 164444345 in words is "one hundred sixty-four million, four hundred forty-four thousand, three hundred forty-five".