164426555 has 4 divisors (see below), whose sum is σ = 197311872. Its totient is φ = 131541240.

The previous prime is 164426531. The next prime is 164426599. The reversal of 164426555 is 555624461.

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

It is not a de Polignac number, because 164426555 - 2¹⁰ = 164425531 is a prime.

It is a super-3 number, since 3×164426555³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16442651 + ... + 16442660.

It is an arithmetic number, because the mean of its divisors is an integer number (49327968).

Almost surely, 2^164426555 is an apocalyptic number.

164426555 is a deficient number, since it is larger than the sum of its proper divisors (32885317).

164426555 is an equidigital number, since it uses as much as digits as its factorization.

164426555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32885316.

The product of its digits is 144000, while the sum is 38.

The square root of 164426555 is about 12822.8918345278. The cubic root of 164426555 is about 547.8445167341.

The spelling of 164426555 in words is "one hundred sixty-four million, four hundred twenty-six thousand, five hundred fifty-five".