1263387584449 has 4 divisors (see below), whose sum is σ = 1263391100464. Its totient is φ = 1263384068436.

The previous prime is 1263387584423. The next prime is 1263387584483. The reversal of 1263387584449 is 9444857833621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1263387584449 - 2⁹ = 1263387583937 is a prime.

It is a super-2 number, since 2×1263387584449² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263387564449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1148607 + ... + 1961140.

It is an arithmetic number, because the mean of its divisors is an integer number (315847775116).

Almost surely, 2^{1263387584449} is an apocalyptic number.

It is an amenable number.

1263387584449 is a deficient number, since it is larger than the sum of its proper divisors (3516015).

1263387584449 is an equidigital number, since it uses as much as digits as its factorization.

1263387584449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516014.

The product of its digits is 139345920, while the sum is 64.

The spelling of 1263387584449 in words is "one trillion, two hundred sixty-three billion, three hundred eighty-seven million, five hundred eighty-four thousand, four hundred forty-nine".