1311500043344 has 80 divisors (see below), whose sum is σ = 2628890341440. Its totient is φ = 633428812800.

The previous prime is 1311500043331. The next prime is 1311500043407. The reversal of 1311500043344 is 4433400051131.

It is a happy number.

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, 63015212 + ... + 63036020.

It is an arithmetic number, because the mean of its divisors is an integer number (32861129268).

Almost surely, 2^{1311500043344} is an apocalyptic number.

It is an amenable number.

1311500043344 is an abundant number, since it is smaller than the sum of its proper divisors (1317390298096).

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

1311500043344 is a wasteful number, since it uses less digits than its factorization.

1311500043344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21868 (or 21862 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 1311500043344 its reverse (4433400051131), we get a palindrome (5744900094475).

The spelling of 1311500043344 in words is "one trillion, three hundred eleven billion, five hundred million, forty-three thousand, three hundred forty-four".