1641165903613 has 2 divisors, whose sum is σ = 1641165903614. Its totient is φ = 1641165903612.

The previous prime is 1641165903521. The next prime is 1641165903653. The reversal of 1641165903613 is 3163095611461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1380594450169 + 260571453444 = 1174987^2 + 510462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1641165903613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641165903653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820582951806 + 820582951807.

It is an arithmetic number, because the mean of its divisors is an integer number (820582951807).

Almost surely, 2^{1641165903613} is an apocalyptic number.

It is an amenable number.

1641165903613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641165903613 is an equidigital number, since it uses as much as digits as its factorization.

1641165903613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 1641165903613 in words is "one trillion, six hundred forty-one billion, one hundred sixty-five million, nine hundred three thousand, six hundred thirteen".