1311232042456 has 64 divisors (see below), whose sum is σ = 2849888448000. Its totient is φ = 553938443520.

The previous prime is 1311232042453. The next prime is 1311232042457. The reversal of 1311232042456 is 6542402321131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311232042453) 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, 23585700 + ... + 23641228.

It is an arithmetic number, because the mean of its divisors is an integer number (44529507000).

Almost surely, 2^{1311232042456} 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 1311232042456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1424944224000).

1311232042456 is an abundant number, since it is smaller than the sum of its proper divisors (1538656405544).

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

1311232042456 is a wasteful number, since it uses less digits than its factorization.

1311232042456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61552 (or 61548 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 1311232042456 its reverse (6542402321131), we get a palindrome (7853634363587).

The spelling of 1311232042456 in words is "one trillion, three hundred eleven billion, two hundred thirty-two million, forty-two thousand, four hundred fifty-six".