164406442115005 has 4 divisors (see below), whose sum is σ = 197287730538012. Its totient is φ = 131525153692000.

The previous prime is 164406442114963. The next prime is 164406442115009. The reversal of 164406442115005 is 500511244604461.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55524166714116 + 108882275400889 = 7451454^2 + 10434667^2 .

It is not a de Polignac number, because 164406442115005 - 2¹⁹ = 164406441590717 is a prime.

It is a super-3 number, since 3×164406442115005³ (a number of 44 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 (164406442115009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16440644211496 + ... + 16440644211505.

It is an arithmetic number, because the mean of its divisors is an integer number (49321932634503).

Almost surely, 2^{164406442115005} is an apocalyptic number.

It is an amenable number.

164406442115005 is a deficient number, since it is larger than the sum of its proper divisors (32881288423007).

164406442115005 is an equidigital number, since it uses as much as digits as its factorization.

164406442115005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32881288423006.

The product of its (nonzero) digits is 460800, while the sum is 43.

Adding to 164406442115005 its reverse (500511244604461), we get a palindrome (664917686719466).

The spelling of 164406442115005 in words is "one hundred sixty-four trillion, four hundred six billion, four hundred forty-two million, one hundred fifteen thousand, five".