164272170 has 16 divisors (see below), whose sum is σ = 394253280. Its totient is φ = 43805904.

The previous prime is 164272159. The next prime is 164272177. The reversal of 164272170 is 71272461.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5475739 = 164272170 / (1 + 6 + 4 + 2 + 7 + 2 + 1 + 7 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (164272177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2737840 + ... + 2737899.

It is an arithmetic number, because the mean of its divisors is an integer number (24640830).

Almost surely, 2^164272170 is an apocalyptic number.

164272170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164272170 is an abundant number, since it is smaller than the sum of its proper divisors (229981110).

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

164272170 is a wasteful number, since it uses less digits than its factorization.

164272170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5475749.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 164272170 is about 12816.8705228695. The cubic root of 164272170 is about 547.6730005197.

The spelling of 164272170 in words is "one hundred sixty-four million, two hundred seventy-two thousand, one hundred seventy".