1331535424691 has 2 divisors, whose sum is σ = 1331535424692. Its totient is φ = 1331535424690.

The previous prime is 1331535424649. The next prime is 1331535424727. The reversal of 1331535424691 is 1964245351331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331535424691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331535424291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665767712345 + 665767712346.

It is an arithmetic number, because the mean of its divisors is an integer number (665767712346).

Almost surely, 2^{1331535424691} is an apocalyptic number.

1331535424691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331535424691 is an equidigital number, since it uses as much as digits as its factorization.

1331535424691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The spelling of 1331535424691 in words is "one trillion, three hundred thirty-one billion, five hundred thirty-five million, four hundred twenty-four thousand, six hundred ninety-one".