1265844485603 has 2 divisors, whose sum is σ = 1265844485604. Its totient is φ = 1265844485602.

The previous prime is 1265844485599. The next prime is 1265844485651. The reversal of 1265844485603 is 3065844485621.

It is a weak prime.

It is an emirp because it is prime and its reverse (3065844485621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1265844485603 - 2² = 1265844485599 is a prime.

It is not a weakly prime, because it can be changed into another prime (1265844485663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632922242801 + 632922242802.

It is an arithmetic number, because the mean of its divisors is an integer number (632922242802).

Almost surely, 2^{1265844485603} is an apocalyptic number.

1265844485603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265844485603 is an equidigital number, since it uses as much as digits as its factorization.

1265844485603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22118400, while the sum is 56.

The spelling of 1265844485603 in words is "one trillion, two hundred sixty-five billion, eight hundred forty-four million, four hundred eighty-five thousand, six hundred three".