1267505263963 has 2 divisors, whose sum is σ = 1267505263964. Its totient is φ = 1267505263962.

The previous prime is 1267505263961. The next prime is 1267505263991. The reversal of 1267505263963 is 3693625057621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1267505263963 - 2¹ = 1267505263961 is a prime.

Together with 1267505263961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1267505263961) 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 as a sum of consecutive naturals, namely, 633752631981 + 633752631982.

It is an arithmetic number, because the mean of its divisors is an integer number (633752631982).

Almost surely, 2^{1267505263963} is an apocalyptic number.

1267505263963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267505263963 is an equidigital number, since it uses as much as digits as its factorization.

1267505263963 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 55.

The spelling of 1267505263963 in words is "one trillion, two hundred sixty-seven billion, five hundred five million, two hundred sixty-three thousand, nine hundred sixty-three".