64785 has 16 divisors (see below), whose sum is σ = 118656. Its totient is φ = 29568.

The previous prime is 64783. The next prime is 64793. The reversal of 64785 is 58746.

It is a happy number.

It is not a de Polignac number, because 64785 - 2¹ = 64783 is a prime.

64785 is a lucky number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64781) 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, 204 + ... + 413.

It is an arithmetic number, because the mean of its divisors is an integer number (7416).

2⁶⁴⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

64785 is a deficient number, since it is larger than the sum of its proper divisors (53871).

64785 is a wasteful number, since it uses less digits than its factorization.

64785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632.

The product of its digits is 6720, while the sum is 30.

The square root of 64785 is about 254.5289767394. The cubic root of 64785 is about 40.1628775391.

The spelling of 64785 in words is "sixty-four thousand, seven hundred eighty-five".