1263387495899 has 2 divisors, whose sum is σ = 1263387495900. Its totient is φ = 1263387495898.

The previous prime is 1263387495791. The next prime is 1263387495907. The reversal of 1263387495899 is 9985947833621.

It is a strong prime.

It is an emirp because it is prime and its reverse (9985947833621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263387495899 is a prime.

It is a super-2 number, since 2×1263387495899² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1263387495499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631693747949 + 631693747950.

It is an arithmetic number, because the mean of its divisors is an integer number (631693747950).

Almost surely, 2^{1263387495899} is an apocalyptic number.

1263387495899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263387495899 is an equidigital number, since it uses as much as digits as its factorization.

1263387495899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705438720, while the sum is 74.

The spelling of 1263387495899 in words is "one trillion, two hundred sixty-three billion, three hundred eighty-seven million, four hundred ninety-five thousand, eight hundred ninety-nine".