1311421534544 has 40 divisors (see below), whose sum is σ = 2778041836800. Its totient is φ = 594773043200.

The previous prime is 1311421534543. The next prime is 1311421534559. The reversal of 1311421534544 is 4454351241131.

It is a junction number, because it is equal to n+sod(n) for n = 1311421534498 and 1311421534507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311421534543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8218592 + ... + 8376639.

It is an arithmetic number, because the mean of its divisors is an integer number (69451045920).

Almost surely, 2^{1311421534544} is an apocalyptic number.

It is an amenable number.

1311421534544 is an abundant number, since it is smaller than the sum of its proper divisors (1466620302256).

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

1311421534544 is a wasteful number, since it uses less digits than its factorization.

1311421534544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16595699 (or 16595693 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

Adding to 1311421534544 its reverse (4454351241131), we get a palindrome (5765772775675).

The spelling of 1311421534544 in words is "one trillion, three hundred eleven billion, four hundred twenty-one million, five hundred thirty-four thousand, five hundred forty-four".