5541823561 has 2 divisors, whose sum is σ = 5541823562. Its totient is φ = 5541823560.

The previous prime is 5541823487. The next prime is 5541823571. The reversal of 5541823561 is 1653281455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5273519161 + 268304400 = 72619^2 + 16380^2 .

It is a cyclic number.

It is not a de Polignac number, because 5541823561 - 2¹⁷ = 5541692489 is a prime.

It is not a weakly prime, because it can be changed into another prime (5541823571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770911780 + 2770911781.

It is an arithmetic number, because the mean of its divisors is an integer number (2770911781).

Almost surely, 2^5541823561 is an apocalyptic number.

It is an amenable number.

5541823561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5541823561 is an equidigital number, since it uses as much as digits as its factorization.

5541823561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144000, while the sum is 40.

The square root of 5541823561 is about 74443.4252368871. The cubic root of 5541823561 is about 1769.6371691837.

The spelling of 5541823561 in words is "five billion, five hundred forty-one million, eight hundred twenty-three thousand, five hundred sixty-one".