64185562805285 has 8 divisors (see below), whose sum is σ = 77265649107576. Its totient is φ = 51186467750080.

The previous prime is 64185562805269. The next prime is 64185562805333. The reversal of 64185562805285 is 58250826558146.

64185562805285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3155234584804 + 61030328220481 = 1776298^2 + 7812191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64185562805285 - 2⁴ = 64185562805269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20247810026 + ... + 20247813195.

It is an arithmetic number, because the mean of its divisors is an integer number (9658206138447).

Almost surely, 2^{64185562805285} is an apocalyptic number.

It is an amenable number.

64185562805285 is a deficient number, since it is larger than the sum of its proper divisors (13080086302291).

64185562805285 is a wasteful number, since it uses less digits than its factorization.

64185562805285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40495623543.

The product of its (nonzero) digits is 184320000, while the sum is 65.

The spelling of 64185562805285 in words is "sixty-four trillion, one hundred eighty-five billion, five hundred sixty-two million, eight hundred five thousand, two hundred eighty-five".