1263876387563 has 2 divisors, whose sum is σ = 1263876387564. Its totient is φ = 1263876387562.

The previous prime is 1263876387481. The next prime is 1263876387617. The reversal of 1263876387563 is 3657836783621.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3657836783621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263876387563 - 2⁸ = 1263876387307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1263876387563.

It is not a weakly prime, because it can be changed into another prime (1263876387863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631938193781 + 631938193782.

It is an arithmetic number, because the mean of its divisors is an integer number (631938193782).

Almost surely, 2^{1263876387563} is an apocalyptic number.

1263876387563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263876387563 is an equidigital number, since it uses as much as digits as its factorization.

1263876387563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 182891520, while the sum is 65.

The spelling of 1263876387563 in words is "one trillion, two hundred sixty-three billion, eight hundred seventy-six million, three hundred eighty-seven thousand, five hundred sixty-three".