5541661439 has 2 divisors, whose sum is σ = 5541661440. Its totient is φ = 5541661438.

The previous prime is 5541661409. The next prime is 5541661457. The reversal of 5541661439 is 9341661455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5541661439 - 2¹² = 5541657343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5541661439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5541661409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2770830719 + 2770830720.

It is an arithmetic number, because the mean of its divisors is an integer number (2770830720).

Almost surely, 2^5541661439 is an apocalyptic number.

5541661439 is a deficient number, since it is larger than the sum of its proper divisors (1).

5541661439 is an equidigital number, since it uses as much as digits as its factorization.

5541661439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 44.

The square root of 5541661439 is about 74442.3363349109. The cubic root of 5541661439 is about 1769.6199125345.

The spelling of 5541661439 in words is "five billion, five hundred forty-one million, six hundred sixty-one thousand, four hundred thirty-nine".