18381267126241 has 2 divisors, whose sum is σ = 18381267126242. Its totient is φ = 18381267126240.

The previous prime is 18381267126227. The next prime is 18381267126367. The reversal of 18381267126241 is 14262176218381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16143239158225 + 2238027968016 = 4017865^2 + 1496004^2 .

It is a cyclic number.

It is not a de Polignac number, because 18381267126241 - 2⁹ = 18381267125729 is a prime.

It is not a weakly prime, because it can be changed into another prime (18381267126941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9190633563120 + 9190633563121.

It is an arithmetic number, because the mean of its divisors is an integer number (9190633563121).

Almost surely, 2^{18381267126241} is an apocalyptic number.

It is an amenable number.

18381267126241 is a deficient number, since it is larger than the sum of its proper divisors (1).

18381267126241 is an equidigital number, since it uses as much as digits as its factorization.

18381267126241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1548288, while the sum is 52.

The spelling of 18381267126241 in words is "eighteen trillion, three hundred eighty-one billion, two hundred sixty-seven million, one hundred twenty-six thousand, two hundred forty-one".