1263387495911 has 2 divisors, whose sum is σ = 1263387495912. Its totient is φ = 1263387495910.

The previous prime is 1263387495907. The next prime is 1263387495917. The reversal of 1263387495911 is 1195947833621.

It is a weak prime.

It is an emirp because it is prime and its reverse (1195947833621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263387495911 - 2² = 1263387495907 is a prime.

It is a super-2 number, since 2×1263387495911² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263387495917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631693747955 + 631693747956.

It is an arithmetic number, because the mean of its divisors is an integer number (631693747956).

Almost surely, 2^{1263387495911} is an apocalyptic number.

1263387495911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263387495911 is an equidigital number, since it uses as much as digits as its factorization.

1263387495911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 59.

The spelling of 1263387495911 in words is "one trillion, two hundred sixty-three billion, three hundred eighty-seven million, four hundred ninety-five thousand, nine hundred eleven".