1312643356444 has 96 divisors (see below), whose sum is σ = 2702614118400. Its totient is φ = 546192659712.

The previous prime is 1312643356441. The next prime is 1312643356447. The reversal of 1312643356444 is 4446533462131.

It is an interprime number because it is at equal distance from previous prime (1312643356441) and next prime (1312643356447).

It is a junction number, because it is equal to n+sod(n) for n = 1312643356394 and 1312643356403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312643356441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169216614 + ... + 169224370.

It is an arithmetic number, because the mean of its divisors is an integer number (28152230400).

Almost surely, 2^{1312643356444} is an apocalyptic number.

1312643356444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312643356444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1351307059200).

1312643356444 is an abundant number, since it is smaller than the sum of its proper divisors (1389970761956).

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

1312643356444 is a wasteful number, since it uses less digits than its factorization.

1312643356444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8827 (or 8825 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 46.

The spelling of 1312643356444 in words is "one trillion, three hundred twelve billion, six hundred forty-three million, three hundred fifty-six thousand, four hundred forty-four".