1215841337449 has 2 divisors, whose sum is σ = 1215841337450. Its totient is φ = 1215841337448.

The previous prime is 1215841337401. The next prime is 1215841337453. The reversal of 1215841337449 is 9447331485121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 718710581824 + 497130755625 = 847768^2 + 705075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1215841337449 - 2²⁵ = 1215807783017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1215841337396 and 1215841337405.

It is not a weakly prime, because it can be changed into another prime (1215841331449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607920668724 + 607920668725.

It is an arithmetic number, because the mean of its divisors is an integer number (607920668725).

Almost surely, 2^{1215841337449} is an apocalyptic number.

It is an amenable number.

1215841337449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215841337449 is an equidigital number, since it uses as much as digits as its factorization.

1215841337449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 52.

The spelling of 1215841337449 in words is "one trillion, two hundred fifteen billion, eight hundred forty-one million, three hundred thirty-seven thousand, four hundred forty-nine".