5563540621 has 2 divisors, whose sum is σ = 5563540622. Its totient is φ = 5563540620.

The previous prime is 5563540579. The next prime is 5563540639. The reversal of 5563540621 is 1260453655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5563071396 + 469225 = 74586^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 5563540621 - 2¹⁵ = 5563507853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5563540691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2781770310 + 2781770311.

It is an arithmetic number, because the mean of its divisors is an integer number (2781770311).

Almost surely, 2^5563540621 is an apocalyptic number.

It is an amenable number.

5563540621 is a deficient number, since it is larger than the sum of its proper divisors (1).

5563540621 is an equidigital number, since it uses as much as digits as its factorization.

5563540621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 5563540621 is about 74589.1454636665. The cubic root of 5563540621 is about 1771.9457489119.

The spelling of 5563540621 in words is "five billion, five hundred sixty-three million, five hundred forty thousand, six hundred twenty-one".