5663721747561 has 16 divisors (see below), whose sum is σ = 7676739907200. Its totient is φ = 3713280232320.

The previous prime is 5663721747557. The next prime is 5663721747581. The reversal of 5663721747561 is 1657471273665.

It is not a de Polignac number, because 5663721747561 - 2² = 5663721747557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5663721747495 and 5663721747504.

It is not an unprimeable number, because it can be changed into a prime (5663721747511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575325 + ... + 3716058.

It is an arithmetic number, because the mean of its divisors is an integer number (479796244200).

Almost surely, 2^{5663721747561} is an apocalyptic number.

It is an amenable number.

5663721747561 is a deficient number, since it is larger than the sum of its proper divisors (2013018159639).

5663721747561 is a wasteful number, since it uses less digits than its factorization.

5663721747561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5297296.

The product of its digits is 44452800, while the sum is 60.

The spelling of 5663721747561 in words is "five trillion, six hundred sixty-three billion, seven hundred twenty-one million, seven hundred forty-seven thousand, five hundred sixty-one".