1263513907219 has 2 divisors, whose sum is σ = 1263513907220. Its totient is φ = 1263513907218.

The previous prime is 1263513907217. The next prime is 1263513907237. The reversal of 1263513907219 is 9127093153621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263513907219 - 2¹ = 1263513907217 is a prime.

It is a super-2 number, since 2×1263513907219² (a number of 25 digits) contains 22 as substring.

Together with 1263513907217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1263513907217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631756953609 + 631756953610.

It is an arithmetic number, because the mean of its divisors is an integer number (631756953610).

Almost surely, 2^{1263513907219} is an apocalyptic number.

1263513907219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263513907219 is an equidigital number, since it uses as much as digits as its factorization.

1263513907219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 1263513907219 in words is "one trillion, two hundred sixty-three billion, five hundred thirteen million, nine hundred seven thousand, two hundred nineteen".