5664637872 has 120 divisors (see below), whose sum is σ = 16183383840. Its totient is φ = 1849236480.

The previous prime is 5664637871. The next prime is 5664637897. The reversal of 5664637872 is 2787364665.

5664637872 is a `hidden beast` number, since 566 + 4 + 6 + 3 + 7 + 8 + 72 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (5664637871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1603404 + ... + 1606932.

It is an arithmetic number, because the mean of its divisors is an integer number (134861532).

Almost surely, 2^5664637872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5664637872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8091691920).

5664637872 is an abundant number, since it is smaller than the sum of its proper divisors (10518745968).

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

5664637872 is a wasteful number, since it uses less digits than its factorization.

5664637872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771 (or 3762 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The square root of 5664637872 is about 75263.7885838867. The cubic root of 5664637872 is about 1782.6142908947.

The spelling of 5664637872 in words is "five billion, six hundred sixty-four million, six hundred thirty-seven thousand, eight hundred seventy-two".