18199541441 has 2 divisors, whose sum is σ = 18199541442. Its totient is φ = 18199541440.

The previous prime is 18199541417. The next prime is 18199541491. The reversal of 18199541441 is 14414599181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12513778225 + 5685763216 = 111865^2 + 75404^2 .

It is a cyclic number.

It is not a de Polignac number, because 18199541441 - 2³⁰ = 17125799617 is a prime.

It is not a weakly prime, because it can be changed into another prime (18199541491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9099770720 + 9099770721.

It is an arithmetic number, because the mean of its divisors is an integer number (9099770721).

Almost surely, 2^18199541441 is an apocalyptic number.

It is an amenable number.

18199541441 is a deficient number, since it is larger than the sum of its proper divisors (1).

18199541441 is an equidigital number, since it uses as much as digits as its factorization.

18199541441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 47.

The spelling of 18199541441 in words is "eighteen billion, one hundred ninety-nine million, five hundred forty-one thousand, four hundred forty-one".