1312563139552 has 72 divisors (see below), whose sum is σ = 3009201836760. Its totient is φ = 561928631040.

The previous prime is 1312563139541. The next prime is 1312563139553. The reversal of 1312563139552 is 2559313652131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312563139553) 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 11 ways as a sum of consecutive naturals, for example, 1030699 + ... + 1920277.

It is an arithmetic number, because the mean of its divisors is an integer number (41794469955).

Almost surely, 2^{1312563139552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312563139552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1504600918380).

1312563139552 is an abundant number, since it is smaller than the sum of its proper divisors (1696638697208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312563139552 is an equidigital number, since it uses as much as digits as its factorization.

1312563139552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890544 (or 890529 counting only the distinct ones).

The product of its digits is 729000, while the sum is 46.

The spelling of 1312563139552 in words is "one trillion, three hundred twelve billion, five hundred sixty-three million, one hundred thirty-nine thousand, five hundred fifty-two".