169621246201 has 9 divisors (see below), whose sum is σ = 186448167759. Its totient is φ = 154197014400.

The previous prime is 169621246199. The next prime is 169621246213. The reversal of 169621246201 is 102642126961.

The square root of 169621246201 is 411851.

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

It can be written as a sum of positive squares in only one way, i.e., 90570300601 + 79050945600 = 300949^2 + 281160^2 .

It is not a de Polignac number, because 169621246201 - 2¹ = 169621246199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169621246241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4511641 + ... + 4549081.

Almost surely, 2^169621246201 is an apocalyptic number.

169621246201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

169621246201 is the 411851-st square number.

169621246201 is the 205926-th centered octagonal number.

It is an amenable number.

169621246201 is a deficient number, since it is larger than the sum of its proper divisors (16826921558).

169621246201 is an frugal number, since it uses more digits than its factorization.

169621246201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74904 (or 37452 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 169621246201 in words is "one hundred sixty-nine billion, six hundred twenty-one million, two hundred forty-six thousand, two hundred one".