1243275581463 has 8 divisors (see below), whose sum is σ = 1666289899248. Its totient is φ = 824555825664.

The previous prime is 1243275581453. The next prime is 1243275581473. The reversal of 1243275581463 is 3641855723421.

It is an interprime number because it is at equal distance from previous prime (1243275581453) and next prime (1243275581473).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243275581463 - 2⁴ = 1243275581447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243275581453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073639820 + ... + 1073640977.

It is an arithmetic number, because the mean of its divisors is an integer number (208286237406).

Almost surely, 2^{1243275581463} is an apocalyptic number.

1243275581463 is a deficient number, since it is larger than the sum of its proper divisors (423014317785).

1243275581463 is a wasteful number, since it uses less digits than its factorization.

1243275581463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147280993.

The product of its digits is 4838400, while the sum is 51.

The spelling of 1243275581463 in words is "one trillion, two hundred forty-three billion, two hundred seventy-five million, five hundred eighty-one thousand, four hundred sixty-three".