1313234243440 has 80 divisors (see below), whose sum is σ = 3673106334720. Its totient is φ = 426554277120.

The previous prime is 1313234243423. The next prime is 1313234243443. The reversal of 1313234243440 is 443424323131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1313234243396 and 1313234243405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313234243443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61701496 + ... + 61722775.

It is an arithmetic number, because the mean of its divisors is an integer number (45913829184).

Almost surely, 2^{1313234243440} is an apocalyptic number.

1313234243440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313234243440 is an abundant number, since it is smaller than the sum of its proper divisors (2359872091280).

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

1313234243440 is a wasteful number, since it uses less digits than its factorization.

1313234243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123424310 (or 123424304 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 1313234243440 its reverse (443424323131), we get a palindrome (1756658566571).

The spelling of 1313234243440 in words is "one trillion, three hundred thirteen billion, two hundred thirty-four million, two hundred forty-three thousand, four hundred forty".