1311625225663 has 4 divisors (see below), whose sum is σ = 1388779650720. Its totient is φ = 1234470800608.

The previous prime is 1311625225661. The next prime is 1311625225733. The reversal of 1311625225663 is 3665225261131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1311625225663 - 2¹ = 1311625225661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311625225661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38577212503 + ... + 38577212536.

It is an arithmetic number, because the mean of its divisors is an integer number (347194912680).

Almost surely, 2^{1311625225663} is an apocalyptic number.

1311625225663 is a deficient number, since it is larger than the sum of its proper divisors (77154425057).

1311625225663 is an equidigital number, since it uses as much as digits as its factorization.

1311625225663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77154425056.

The product of its digits is 388800, while the sum is 43.

The spelling of 1311625225663 in words is "one trillion, three hundred eleven billion, six hundred twenty-five million, two hundred twenty-five thousand, six hundred sixty-three".