64170 has 48 divisors (see below), whose sum is σ = 179712. Its totient is φ = 15840.

The previous prime is 64157. The next prime is 64171. The reversal of 64170 is 7146.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (64171) by changing a digit.

64170 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2055 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (3744).

2⁶⁴¹⁷⁰ is an apocalyptic number.

64170 is the 207-th pentagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89856).

64170 is an abundant number, since it is smaller than the sum of its proper divisors (115542).

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

64170 is a wasteful number, since it uses less digits than its factorization.

64170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 64170 is about 253.3179819910. The cubic root of 64170 is about 40.0353853544.

The spelling of 64170 in words is "sixty-four thousand, one hundred seventy".