64155 has 32 divisors (see below), whose sum is σ = 129024. Its totient is φ = 26496.

The previous prime is 64153. The next prime is 64157. The reversal of 64155 is 55146.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64153) and next prime (64157).

It is not a de Polignac number, because 64155 - 2¹ = 64153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

Its product of digits (600) is a multiple of the sum of its prime divisors (75).

It is not an unprimeable number, because it can be changed into a prime (64151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1342 + ... + 1388.

It is an arithmetic number, because the mean of its divisors is an integer number (4032).

2⁶⁴¹⁵⁵ is an apocalyptic number.

64155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

64155 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64512).

64155 is a wasteful number, since it uses less digits than its factorization.

64155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75.

The product of its digits is 600, while the sum is 21.

The square root of 64155 is about 253.2883732034. The cubic root of 64155 is about 40.0322656329.

Subtracting from 64155 its reverse (55146), we obtain a palindrome (9009).

It can be divided in two parts, 641 and 55, that added together give a palindrome (696).

The spelling of 64155 in words is "sixty-four thousand, one hundred fifty-five".