1311731616028 has 24 divisors (see below), whose sum is σ = 2302949913264. Its totient is φ = 653749324800.

The previous prime is 1311731615989. The next prime is 1311731616059. The reversal of 1311731616028 is 8206161371131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122108 + ... + 1970428.

It is an arithmetic number, because the mean of its divisors is an integer number (95956246386).

Almost surely, 2^{1311731616028} is an apocalyptic number.

It is an amenable number.

1311731616028 is a deficient number, since it is larger than the sum of its proper divisors (991218297236).

1311731616028 is a wasteful number, since it uses less digits than its factorization.

1311731616028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849573 (or 849571 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

Adding to 1311731616028 its reverse (8206161371131), we get a palindrome (9517892987159).

The spelling of 1311731616028 in words is "one trillion, three hundred eleven billion, seven hundred thirty-one million, six hundred sixteen thousand, twenty-eight".