1311411651256 has 64 divisors (see below), whose sum is σ = 2833470362880. Its totient is φ = 557391905280.

The previous prime is 1311411651241. The next prime is 1311411651269. The reversal of 1311411651256 is 6521561141131.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3147840 + ... + 3540016.

It is an arithmetic number, because the mean of its divisors is an integer number (44272974420).

Almost surely, 2^{1311411651256} is an apocalyptic number.

It is an amenable number.

1311411651256 is an abundant number, since it is smaller than the sum of its proper divisors (1522058711624).

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

1311411651256 is a wasteful number, since it uses less digits than its factorization.

1311411651256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392684 (or 392680 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

Adding to 1311411651256 its reverse (6521561141131), we get a palindrome (7832972792387).

The spelling of 1311411651256 in words is "one trillion, three hundred eleven billion, four hundred eleven million, six hundred fifty-one thousand, two hundred fifty-six".