1331481919507 has 2 divisors, whose sum is σ = 1331481919508. Its totient is φ = 1331481919506.

The previous prime is 1331481919409. The next prime is 1331481919517. The reversal of 1331481919507 is 7059191841331.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331481919507 - 2⁷ = 1331481919379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331481919517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665740959753 + 665740959754.

It is an arithmetic number, because the mean of its divisors is an integer number (665740959754).

Almost surely, 2^{1331481919507} is an apocalyptic number.

1331481919507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331481919507 is an equidigital number, since it uses as much as digits as its factorization.

1331481919507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 1331481919507 in words is "one trillion, three hundred thirty-one billion, four hundred eighty-one million, nine hundred nineteen thousand, five hundred seven".