1311265430356 has 48 divisors (see below), whose sum is σ = 2727512233600. Its totient is φ = 539903387520.

The previous prime is 1311265430317. The next prime is 1311265430383. The reversal of 1311265430356 is 6530345621131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8853531 + ... + 9000418.

Almost surely, 2^{1311265430356} is an apocalyptic number.

It is an amenable number.

1311265430356 is an abundant number, since it is smaller than the sum of its proper divisors (1416246803244).

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

1311265430356 is a wasteful number, since it uses less digits than its factorization.

1311265430356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17854064 (or 17854062 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 1311265430356 in words is "one trillion, three hundred eleven billion, two hundred sixty-five million, four hundred thirty thousand, three hundred fifty-six".