5663521361 has 4 divisors (see below), whose sum is σ = 5664136500. Its totient is φ = 5662906224.

The previous prime is 5663521337. The next prime is 5663521379. The reversal of 5663521361 is 1631253665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1631253665 = 5 ⋅326250733.

It can be written as a sum of positive squares in 2 ways, for example, as 4390387600 + 1273133761 = 66260^2 + 35681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5663521361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5663521261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293546 + ... + 312243.

It is an arithmetic number, because the mean of its divisors is an integer number (1416034125).

Almost surely, 2^5663521361 is an apocalyptic number.

It is an amenable number.

5663521361 is a deficient number, since it is larger than the sum of its proper divisors (615139).

5663521361 is an equidigital number, since it uses as much as digits as its factorization.

5663521361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615138.

The product of its digits is 97200, while the sum is 38.

The square root of 5663521361 is about 75256.3708997451. The cubic root of 5663521361 is about 1782.4971642994.

The spelling of 5663521361 in words is "five billion, six hundred sixty-three million, five hundred twenty-one thousand, three hundred sixty-one".