1263431254663 has 4 divisors (see below), whose sum is σ = 1318363048368. Its totient is φ = 1208499460960.

The previous prime is 1263431254633. The next prime is 1263431254711. The reversal of 1263431254663 is 3664521343621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263431254663 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 (1263431254633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27465896818 + ... + 27465896863.

It is an arithmetic number, because the mean of its divisors is an integer number (329590762092).

Almost surely, 2^{1263431254663} is an apocalyptic number.

1263431254663 is a deficient number, since it is larger than the sum of its proper divisors (54931793705).

1263431254663 is an equidigital number, since it uses as much as digits as its factorization.

1263431254663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54931793704.

The product of its digits is 1866240, while the sum is 46.

The spelling of 1263431254663 in words is "one trillion, two hundred sixty-three billion, four hundred thirty-one million, two hundred fifty-four thousand, six hundred sixty-three".