5663728859881 has 27 divisors (see below), whose sum is σ = 5853815711877. Its totient is φ = 5479768139040.

The previous prime is 5663728859869. The next prime is 5663728859891. The reversal of 5663728859881 is 1889588273665.

The square root of 5663728859881 is 2379859.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 88538978025 + 5575189881856 = 297555^2 + 2361184^2 .

It is not a de Polignac number, because 5663728859881 - 2⁷ = 5663728859753 is a prime.

It is a super-2 number, since 2×5663728859881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5663728859798 and 5663728859807.

It is not an unprimeable number, because it can be changed into a prime (5663728859891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10468999471 + ... + 10469000011.

Almost surely, 2^{5663728859881} is an apocalyptic number.

5663728859881 is the 2379859-th square number.

5663728859881 is the 1189930-th centered octagonal number.

It is an amenable number.

5663728859881 is a deficient number, since it is larger than the sum of its proper divisors (190086851996).

5663728859881 is an frugal number, since it uses more digits than its factorization.

5663728859881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354 (or 677 counting only the distinct ones).

The product of its digits is 1393459200, while the sum is 76.

The spelling of 5663728859881 in words is "five trillion, six hundred sixty-three billion, seven hundred twenty-eight million, eight hundred fifty-nine thousand, eight hundred eighty-one".