1311235133556 has 48 divisors (see below), whose sum is σ = 3063597562368. Its totient is φ = 436500232800.

The previous prime is 1311235133521. The next prime is 1311235133563. The reversal of 1311235133556 is 6553315321131.

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, 44997111 + ... + 45026241.

It is an arithmetic number, because the mean of its divisors is an integer number (63824949216).

Almost surely, 2^{1311235133556} is an apocalyptic number.

It is an amenable number.

1311235133556 is an abundant number, since it is smaller than the sum of its proper divisors (1752362428812).

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

1311235133556 is a wasteful number, since it uses less digits than its factorization.

1311235133556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33972 (or 33970 counting only the distinct ones).

The product of its digits is 121500, while the sum is 39.

The spelling of 1311235133556 in words is "one trillion, three hundred eleven billion, two hundred thirty-five million, one hundred thirty-three thousand, five hundred fifty-six".