1331481919489 has 4 divisors (see below), whose sum is σ = 1331618927040. Its totient is φ = 1331344911940.

The previous prime is 1331481919409. The next prime is 1331481919507. The reversal of 1331481919489 is 9849191841331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1331481919489 - 2²⁵ = 1331448365057 is a prime.

It is a super-2 number, since 2×1331481919489² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331481919409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68489197 + ... + 68508634.

It is an arithmetic number, because the mean of its divisors is an integer number (332904731760).

Almost surely, 2^{1331481919489} is an apocalyptic number.

It is an amenable number.

1331481919489 is a deficient number, since it is larger than the sum of its proper divisors (137007551).

1331481919489 is an equidigital number, since it uses as much as digits as its factorization.

1331481919489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137007550.

The product of its digits is 6718464, while the sum is 61.

The spelling of 1331481919489 in words is "one trillion, three hundred thirty-one billion, four hundred eighty-one million, nine hundred nineteen thousand, four hundred eighty-nine".