5663917081 has 27 divisors (see below), whose sum is σ = 6377391741. Its totient is φ = 5028505344.

The previous prime is 5663917069. The next prime is 5663917111. The reversal of 5663917081 is 1807193665.

It is a happy number.

The square root of 5663917081 is 75259.

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 2859481 + 5661057600 = 1691^2 + 75240^2 .

It is not a de Polignac number, because 5663917081 - 2¹⁵ = 5663884313 is a prime.

It is a super-2 number, since 2×5663917081² = 64159913400887121122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5663917381) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 24308541 + ... + 24308773.

Almost surely, 2^5663917081 is an apocalyptic number.

5663917081 is the 75259-th square number.

5663917081 is the 37630-th centered octagonal number.

It is an amenable number.

5663917081 is a deficient number, since it is larger than the sum of its proper divisors (713474660).

5663917081 is an equidigital number, since it uses as much as digits as its factorization.

5663917081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The cubic root of 5663917081 is about 1782.5386787156.

The spelling of 5663917081 in words is "five billion, six hundred sixty-three million, nine hundred seventeen thousand, eighty-one".