1331811388674 has 48 divisors (see below), whose sum is σ = 3271115702400. Its totient is φ = 388220322528.

The previous prime is 1331811388667. The next prime is 1331811388679. The reversal of 1331811388674 is 4768831181331.

1331811388674 is a `hidden beast` number, since 13 + 3 + 181 + 1 + 388 + 6 + 74 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1331811388674.

It is not an unprimeable number, because it can be changed into a prime (1331811388679) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149771914 + ... + 149780805.

It is an arithmetic number, because the mean of its divisors is an integer number (68148243800).

Almost surely, 2^{1331811388674} is an apocalyptic number.

1331811388674 is an abundant number, since it is smaller than the sum of its proper divisors (1939304313726).

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

1331811388674 is a wasteful number, since it uses less digits than its factorization.

1331811388674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299552759 (or 299552756 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 1331811388674 in words is "one trillion, three hundred thirty-one billion, eight hundred eleven million, three hundred eighty-eight thousand, six hundred seventy-four".