164419685 has 8 divisors (see below), whose sum is σ = 197407896. Its totient is φ = 131466240.

The previous prime is 164419681. The next prime is 164419729. The reversal of 164419685 is 586914461.

164419685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 49801249 + 114618436 = 7057^2 + 10706^2 .

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

It is not a de Polignac number, because 164419685 - 2² = 164419681 is a prime.

It is a super-3 number, since 3×164419685³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164419681) 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, 3197 + ... + 18413.

It is an arithmetic number, because the mean of its divisors is an integer number (24675987).

Almost surely, 2^164419685 is an apocalyptic number.

It is an amenable number.

164419685 is a deficient number, since it is larger than the sum of its proper divisors (32988211).

164419685 is a wasteful number, since it uses less digits than its factorization.

164419685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17383.

The product of its digits is 207360, while the sum is 44.

The square root of 164419685 is about 12822.6239514383. The cubic root of 164419685 is about 547.8368866928.

The spelling of 164419685 in words is "one hundred sixty-four million, four hundred nineteen thousand, six hundred eighty-five".