164551111201 has 9 divisors (see below), whose sum is σ = 165371740849. Its totient is φ = 163734539764.

The previous prime is 164551111171. The next prime is 164551111259. The reversal of 164551111201 is 102111155461.

The square root of 164551111201 is 405649.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 164551111201 - 2⁷ = 164551111073 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 164551111201.

It is not an unprimeable number, because it can be changed into a prime (164551111001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 92081430 + ... + 92083216.

Almost surely, 2^164551111201 is an apocalyptic number.

164551111201 is the 405649-th square number.

164551111201 is the 202825-th centered octagonal number.

It is an amenable number.

164551111201 is a deficient number, since it is larger than the sum of its proper divisors (820629648).

164551111201 is an frugal number, since it uses more digits than its factorization.

164551111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 164551111201 its reverse (102111155461), we get a palindrome (266662266662).

The spelling of 164551111201 in words is "one hundred sixty-four billion, five hundred fifty-one million, one hundred eleven thousand, two hundred one".