1331183255820 has 96 divisors (see below), whose sum is σ = 4073087966976. Its totient is φ = 322161235200.

The previous prime is 1331183255807. The next prime is 1331183255827. The reversal of 1331183255820 is 285523811331.

It is not an unprimeable number, because it can be changed into a prime (1331183255827) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1330591 + ... + 2105430.

It is an arithmetic number, because the mean of its divisors is an integer number (42427999656).

Almost surely, 2^{1331183255820} is an apocalyptic number.

1331183255820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331183255820 is an abundant number, since it is smaller than the sum of its proper divisors (2741904711156).

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

1331183255820 is a wasteful number, since it uses less digits than its factorization.

1331183255820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436631 (or 3436629 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 1331183255820 in words is "one trillion, three hundred thirty-one billion, one hundred eighty-three million, two hundred fifty-five thousand, eight hundred twenty".