5563599781 has 2 divisors, whose sum is σ = 5563599782. Its totient is φ = 5563599780.

The previous prime is 5563599749. The next prime is 5563599787. The reversal of 5563599781 is 1879953655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3753522756 + 1810077025 = 61266^2 + 42545^2 .

It is a cyclic number.

It is not a de Polignac number, because 5563599781 - 2⁵ = 5563599749 is a prime.

It is a super-2 number, since 2×5563599781² = 61907285046286495922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5563599787) 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 as a sum of consecutive naturals, namely, 2781799890 + 2781799891.

It is an arithmetic number, because the mean of its divisors is an integer number (2781799891).

Almost surely, 2^5563599781 is an apocalyptic number.

It is an amenable number.

5563599781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5563599781 is an equidigital number, since it uses as much as digits as its factorization.

5563599781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206000, while the sum is 58.

The square root of 5563599781 is about 74589.5420350601. The cubic root of 5563599781 is about 1771.9520295610.

The spelling of 5563599781 in words is "five billion, five hundred sixty-three million, five hundred ninety-nine thousand, seven hundred eighty-one".