5721105168 has 200 divisors, whose sum is σ = 17113112280. Its totient is φ = 1843845120.

The previous prime is 5721105163. The next prime is 5721105179. The reversal of 5721105168 is 8615011275.

It can be written as a sum of positive squares in 4 ways, for example, as 2773918224 + 2947186944 = 52668^2 + 54288^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (5721105161) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10980748 + ... + 10981268.

Almost surely, 2^5721105168 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 5721105168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8556556140).

5721105168 is an abundant number, since it is smaller than the sum of its proper divisors (11392007112).

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

5721105168 is a wasteful number, since it uses less digits than its factorization.

5721105168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The square root of 5721105168 is about 75637.9875988250. The cubic root of 5721105168 is about 1788.5179797419.

It can be divided in two parts, 5721 and 105168, that added together give a square (110889 = 333²).

The spelling of 5721105168 in words is "five billion, seven hundred twenty-one million, one hundred five thousand, one hundred sixty-eight".