5645571664518 has 128 divisors (see below), whose sum is σ = 13375888128000. Its totient is φ = 1758875212800.

The previous prime is 5645571664517. The next prime is 5645571664549. The reversal of 5645571664518 is 8154661755465.

5645571664518 is a `hidden beast` number, since 5 + 6 + 4 + 5 + 57 + 1 + 6 + 64 + 518 = 666.

It is a super-2 number, since 2×5645571664518² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5645571664517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 788594223 + ... + 788601381.

It is an arithmetic number, because the mean of its divisors is an integer number (104499126000).

Almost surely, 2^{5645571664518} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5645571664518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6687944064000).

5645571664518 is an abundant number, since it is smaller than the sum of its proper divisors (7730316463482).

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

5645571664518 is a wasteful number, since it uses less digits than its factorization.

5645571664518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13027 (or 13021 counting only the distinct ones).

The product of its digits is 120960000, while the sum is 63.

The spelling of 5645571664518 in words is "five trillion, six hundred forty-five billion, five hundred seventy-one million, six hundred sixty-four thousand, five hundred eighteen".