5637444881 has 4 divisors (see below), whose sum is σ = 5638805172. Its totient is φ = 5636084592.

The previous prime is 5637444871. The next prime is 5637444899. The reversal of 5637444881 is 1884447365.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 930250000 + 4707194881 = 30500^2 + 68609^2 .

It is a cyclic number.

It is not a de Polignac number, because 5637444881 - 2¹⁰ = 5637443857 is a prime.

It is a super-2 number, since 2×5637444881² = 63561569572626208322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5637444811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673910 + ... + 682223.

It is an arithmetic number, because the mean of its divisors is an integer number (1409701293).

Almost surely, 2^5637444881 is an apocalyptic number.

It is an amenable number.

5637444881 is a deficient number, since it is larger than the sum of its proper divisors (1360291).

5637444881 is a wasteful number, since it uses less digits than its factorization.

5637444881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360290.

The product of its digits is 2580480, while the sum is 50.

The square root of 5637444881 is about 75082.9200351185. The cubic root of 5637444881 is about 1779.7572451215.

The spelling of 5637444881 in words is "five billion, six hundred thirty-seven million, four hundred forty-four thousand, eight hundred eighty-one".