164404655 has 4 divisors (see below), whose sum is σ = 197285592. Its totient is φ = 131523720.

The previous prime is 164404649. The next prime is 164404673. The reversal of 164404655 is 556404461.

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

It is not a de Polignac number, because 164404655 - 2²⁶ = 97295791 is a prime.

It is a super-3 number, since 3×164404655³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent 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, 16440461 + ... + 16440470.

It is an arithmetic number, because the mean of its divisors is an integer number (49321398).

Almost surely, 2^164404655 is an apocalyptic number.

164404655 is a deficient number, since it is larger than the sum of its proper divisors (32880937).

164404655 is an equidigital number, since it uses as much as digits as its factorization.

164404655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32880936.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 164404655 is about 12822.0378645518. The cubic root of 164404655 is about 547.8201931537.

The spelling of 164404655 in words is "one hundred sixty-four million, four hundred four thousand, six hundred fifty-five".