5581440181 has 2 divisors, whose sum is σ = 5581440182. Its totient is φ = 5581440180.

The previous prime is 5581440149. The next prime is 5581440197. The reversal of 5581440181 is 1810441855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2880039556 + 2701400625 = 53666^2 + 51975^2 .

It is a cyclic number.

It is not a de Polignac number, because 5581440181 - 2⁵ = 5581440149 is a prime.

It is a super-2 number, since 2×5581440181² = 62304948988162625522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5581440181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5581440131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2790720090 + 2790720091.

It is an arithmetic number, because the mean of its divisors is an integer number (2790720091).

Almost surely, 2^5581440181 is an apocalyptic number.

It is an amenable number.

5581440181 is a deficient number, since it is larger than the sum of its proper divisors (1).

5581440181 is an equidigital number, since it uses as much as digits as its factorization.

5581440181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 5581440181 is about 74709.0368094784. The cubic root of 5581440181 is about 1773.8440062562.

The spelling of 5581440181 in words is "five billion, five hundred eighty-one million, four hundred forty thousand, one hundred eighty-one".