1329056313961 has 2 divisors, whose sum is σ = 1329056313962. Its totient is φ = 1329056313960.

The previous prime is 1329056313931. The next prime is 1329056313983. The reversal of 1329056313961 is 1693136509231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 905626302736 + 423430011225 = 951644^2 + 650715^2 .

It is an emirp because it is prime and its reverse (1693136509231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1329056313961 - 2²³ = 1329047925353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1329056313901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664528156980 + 664528156981.

It is an arithmetic number, because the mean of its divisors is an integer number (664528156981).

Almost surely, 2^{1329056313961} is an apocalyptic number.

It is an amenable number.

1329056313961 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329056313961 is an equidigital number, since it uses as much as digits as its factorization.

1329056313961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 787320, while the sum is 49.

The spelling of 1329056313961 in words is "one trillion, three hundred twenty-nine billion, fifty-six million, three hundred thirteen thousand, nine hundred sixty-one".