164611555 has 4 divisors (see below), whose sum is σ = 197533872. Its totient is φ = 131689240.

The previous prime is 164611549. The next prime is 164611607. The reversal of 164611555 is 555116461.

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

It is not a de Polignac number, because 164611555 - 2⁹ = 164611043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164611555.

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, 16461151 + ... + 16461160.

It is an arithmetic number, because the mean of its divisors is an integer number (49383468).

Almost surely, 2^164611555 is an apocalyptic number.

164611555 is a deficient number, since it is larger than the sum of its proper divisors (32922317).

164611555 is an equidigital number, since it uses as much as digits as its factorization.

164611555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32922316.

The product of its digits is 18000, while the sum is 34.

The square root of 164611555 is about 12830.1034680161. The cubic root of 164611555 is about 548.0499037705.

The spelling of 164611555 in words is "one hundred sixty-four million, six hundred eleven thousand, five hundred fifty-five".