1213635145663 has 4 divisors (see below), whose sum is σ = 1213969391968. Its totient is φ = 1213300899360.

The previous prime is 1213635145643. The next prime is 1213635145669. The reversal of 1213635145663 is 3665415363121.

It is a happy number.

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 1213635145663 - 2⁵ = 1213635145631 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 (1213635145669) 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, 167117706 + ... + 167124967.

It is an arithmetic number, because the mean of its divisors is an integer number (303492347992).

Almost surely, 2^{1213635145663} is an apocalyptic number.

1213635145663 is a deficient number, since it is larger than the sum of its proper divisors (334246305).

1213635145663 is an equidigital number, since it uses as much as digits as its factorization.

1213635145663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334246304.

The product of its digits is 1166400, while the sum is 46.

The spelling of 1213635145663 in words is "one trillion, two hundred thirteen billion, six hundred thirty-five million, one hundred forty-five thousand, six hundred sixty-three".