164221713165 has 16 divisors (see below), whose sum is σ = 263902147200. Its totient is φ = 87202444992.

The previous prime is 164221713163. The next prime is 164221713169. The reversal of 164221713165 is 561317122461.

It is not a de Polignac number, because 164221713165 - 2¹ = 164221713163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164221713163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23900745 + ... + 23907614.

It is an arithmetic number, because the mean of its divisors is an integer number (16493884200).

Almost surely, 2^164221713165 is an apocalyptic number.

164221713165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

164221713165 is a deficient number, since it is larger than the sum of its proper divisors (99680434035).

164221713165 is a wasteful number, since it uses less digits than its factorization.

164221713165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47808596.

The product of its digits is 60480, while the sum is 39.

The spelling of 164221713165 in words is "one hundred sixty-four billion, two hundred twenty-one million, seven hundred thirteen thousand, one hundred sixty-five".