162217228644 has 81 divisors (see below), whose sum is σ = 432889035033. Its totient is φ = 51211993824.

The previous prime is 162217228567. The next prime is 162217228687. The reversal of 162217228644 is 446822712261.

The square root of 162217228644 is 402762.

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

162217228644 is a `hidden beast` number, since 1 + 622 + 17 + 2 + 2 + 8 + 6 + 4 + 4 = 666.

162217228644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 132663492900 + 29553735744 = 364230^2 + 171912^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 162217228644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45913102 + ... + 45916634.

Almost surely, 2^162217228644 is an apocalyptic number.

162217228644 is the 402762-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 162217228644

162217228644 is an abundant number, since it is smaller than the sum of its proper divisors (270671806389).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

162217228644 is an equidigital number, since it uses as much as digits as its factorization.

162217228644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7114 (or 3557 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 162217228644 in words is "one hundred sixty-two billion, two hundred seventeen million, two hundred twenty-eight thousand, six hundred forty-four".