1331089266449 has 2 divisors, whose sum is σ = 1331089266450. Its totient is φ = 1331089266448.

The previous prime is 1331089266389. The next prime is 1331089266473. The reversal of 1331089266449 is 9446629801331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 891032163025 + 440057103424 = 943945^2 + 663368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331089266449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331089266394 and 1331089266403.

It is not a weakly prime, because it can be changed into another prime (1331089266649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665544633224 + 665544633225.

It is an arithmetic number, because the mean of its divisors is an integer number (665544633225).

Almost surely, 2^{1331089266449} is an apocalyptic number.

It is an amenable number.

1331089266449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331089266449 is an equidigital number, since it uses as much as digits as its factorization.

1331089266449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 1331089266449 in words is "one trillion, three hundred thirty-one billion, eighty-nine million, two hundred sixty-six thousand, four hundred forty-nine".