5628731958881 has 4 divisors (see below), whose sum is σ = 5631004360212. Its totient is φ = 5626459557552.

The previous prime is 5628731958859. The next prime is 5628731958917. The reversal of 5628731958881 is 1888591378265.

It is a happy number.

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 4399757953600 + 1228974005281 = 2097560^2 + 1108591^2 .

It is a cyclic number.

It is not a de Polignac number, because 5628731958881 - 2¹⁰ = 5628731957857 is a prime.

It is a super-2 number, since 2×5628731958881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5628761958881) 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 3 ways as a sum of consecutive naturals, for example, 1136196950 + ... + 1136201903.

It is an arithmetic number, because the mean of its divisors is an integer number (1407751090053).

Almost surely, 2^{5628731958881} is an apocalyptic number.

It is an amenable number.

5628731958881 is a deficient number, since it is larger than the sum of its proper divisors (2272401331).

5628731958881 is a wasteful number, since it uses less digits than its factorization.

5628731958881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272401330.

The product of its digits is 232243200, while the sum is 71.

The spelling of 5628731958881 in words is "five trillion, six hundred twenty-eight billion, seven hundred thirty-one million, nine hundred fifty-eight thousand, eight hundred eighty-one".