5664821085 has 48 divisors (see below), whose sum is σ = 12241906560. Its totient is φ = 2354209920.

The previous prime is 5664821069. The next prime is 5664821147. The reversal of 5664821085 is 5801284665.

5664821085 is a `hidden beast` number, since 5 + 66 + 482 + 108 + 5 = 666.

It is not a de Polignac number, because 5664821085 - 2⁴ = 5664821069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5664821085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 813970 + ... + 820899.

It is an arithmetic number, because the mean of its divisors is an integer number (255039720).

Almost surely, 2^5664821085 is an apocalyptic number.

5664821085 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5664821085 is an abundant number, since it is smaller than the sum of its proper divisors (6577085475).

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

5664821085 is a wasteful number, since it uses less digits than its factorization.

5664821085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634898 (or 1634895 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 5664821085 is about 75265.0057131467. The cubic root of 5664821085 is about 1782.6335092218.

The spelling of 5664821085 in words is "five billion, six hundred sixty-four million, eight hundred twenty-one thousand, eighty-five".