5663765521 has 2 divisors, whose sum is σ = 5663765522. Its totient is φ = 5663765520.

The previous prime is 5663765519. The next prime is 5663765561. The reversal of 5663765521 is 1255673665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5616003600 + 47761921 = 74940^2 + 6911^2 .

It is a cyclic number.

It is not a de Polignac number, because 5663765521 - 2¹ = 5663765519 is a prime.

Together with 5663765519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5663765561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2831882760 + 2831882761.

It is an arithmetic number, because the mean of its divisors is an integer number (2831882761).

Almost surely, 2^5663765521 is an apocalyptic number.

It is an amenable number.

5663765521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5663765521 is an equidigital number, since it uses as much as digits as its factorization.

5663765521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 46.

The square root of 5663765521 is about 75257.9930705038. The cubic root of 5663765521 is about 1782.5227790024.

The spelling of 5663765521 in words is "five billion, six hundred sixty-three million, seven hundred sixty-five thousand, five hundred twenty-one".