1311043732920 has 96 divisors (see below), whose sum is σ = 4398340302720. Its totient is φ = 338333863680.

The previous prime is 1311043732883. The next prime is 1311043732939. The reversal of 1311043732920 is 292373401131.

1311043732920 is a `hidden beast` number, since 131 + 1 + 0 + 437 + 3 + 2 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58727359 + ... + 58749678.

It is an arithmetic number, because the mean of its divisors is an integer number (45816044820).

Almost surely, 2^{1311043732920} is an apocalyptic number.

1311043732920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311043732920 is an abundant number, since it is smaller than the sum of its proper divisors (3087296569800).

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

1311043732920 is a wasteful number, since it uses less digits than its factorization.

1311043732920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117477085 (or 117477078 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 1311043732920 in words is "one trillion, three hundred eleven billion, forty-three million, seven hundred thirty-two thousand, nine hundred twenty".