1263544450667 has 2 divisors, whose sum is σ = 1263544450668. Its totient is φ = 1263544450666.

The previous prime is 1263544450639. The next prime is 1263544450673. The reversal of 1263544450667 is 7660544453621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263544450667 - 2²⁰ = 1263543402091 is a prime.

It is a super-2 number, since 2×1263544450667² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1263544450697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631772225333 + 631772225334.

It is an arithmetic number, because the mean of its divisors is an integer number (631772225334).

Almost surely, 2^{1263544450667} is an apocalyptic number.

1263544450667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263544450667 is an equidigital number, since it uses as much as digits as its factorization.

1263544450667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 53.

The spelling of 1263544450667 in words is "one trillion, two hundred sixty-three billion, five hundred forty-four million, four hundred fifty thousand, six hundred sixty-seven".