1263867484849 has 2 divisors, whose sum is σ = 1263867484850. Its totient is φ = 1263867484848.

The previous prime is 1263867484829. The next prime is 1263867484879. The reversal of 1263867484849 is 9484847683621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 840535075249 + 423332409600 = 916807^2 + 650640^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263867484849 - 2⁷ = 1263867484721 is a prime.

It is a super-2 number, since 2×1263867484849² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1263867484829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631933742424 + 631933742425.

It is an arithmetic number, because the mean of its divisors is an integer number (631933742425).

Almost surely, 2^{1263867484849} is an apocalyptic number.

It is an amenable number.

1263867484849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263867484849 is an equidigital number, since it uses as much as digits as its factorization.

1263867484849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 445906944, while the sum is 70.

The spelling of 1263867484849 in words is "one trillion, two hundred sixty-three billion, eight hundred sixty-seven million, four hundred eighty-four thousand, eight hundred forty-nine".