164281870489 has 9 divisors (see below), whose sum is σ = 180579188181. Its totient is φ = 149343101820.

The previous prime is 164281870399. The next prime is 164281870513. The reversal of 164281870489 is 984078182461.

The square root of 164281870489 is 405317.

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

It is not a de Polignac number, because 164281870489 - 2¹⁷ = 164281739417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164281870589) 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, 4440064 + ... + 4476910.

Almost surely, 2^164281870489 is an apocalyptic number.

164281870489 is the 405317-th square number.

164281870489 is the 202659-th centered octagonal number.

It is an amenable number.

164281870489 is a deficient number, since it is larger than the sum of its proper divisors (16297317692).

164281870489 is an frugal number, since it uses more digits than its factorization.

164281870489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73716 (or 36858 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 58.

The spelling of 164281870489 in words is "one hundred sixty-four billion, two hundred eighty-one million, eight hundred seventy thousand, four hundred eighty-nine".