1312563751399 has 4 divisors (see below), whose sum is σ = 1316458599664. Its totient is φ = 1308668903136.

The previous prime is 1312563751397. The next prime is 1312563751409. The reversal of 1312563751399 is 9931573652131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312563751399 - 2¹ = 1312563751397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312563751397) 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 3 ways as a sum of consecutive naturals, for example, 1947423627 + ... + 1947424300.

It is an arithmetic number, because the mean of its divisors is an integer number (329114649916).

Almost surely, 2^{1312563751399} is an apocalyptic number.

1312563751399 is a deficient number, since it is larger than the sum of its proper divisors (3894848265).

1312563751399 is an equidigital number, since it uses as much as digits as its factorization.

1312563751399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894848264.

The product of its digits is 4592700, while the sum is 55.

The spelling of 1312563751399 in words is "one trillion, three hundred twelve billion, five hundred sixty-three million, seven hundred fifty-one thousand, three hundred ninety-nine".