5637721124664 has 864 divisors, whose sum is σ = 18103753886400. Its totient is φ = 1578898759680.

The previous prime is 5637721124621. The next prime is 5637721124723. The reversal of 5637721124664 is 4664211277365.

5637721124664 is a `hidden beast` number, since 5 + 6 + 377 + 21 + 1 + 246 + 6 + 4 = 666.

It is a super-2 number, since 2×5637721124664² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5637721124664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 20803398849 + ... + 20803399119.

It is an arithmetic number, because the mean of its divisors is an integer number (20953418850).

Almost surely, 2^{5637721124664} 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 5637721124664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9051876943200).

5637721124664 is an abundant number, since it is smaller than the sum of its proper divisors (12466032761736).

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

5637721124664 is a wasteful number, since it uses less digits than its factorization.

5637721124664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 424 counting only the distinct ones).

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

The spelling of 5637721124664 in words is "five trillion, six hundred thirty-seven billion, seven hundred twenty-one million, one hundred twenty-four thousand, six hundred sixty-four".