5641731663121 has 2 divisors, whose sum is σ = 5641731663122. Its totient is φ = 5641731663120.

The previous prime is 5641731663103. The next prime is 5641731663133. The reversal of 5641731663121 is 1213661371465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4534110129025 + 1107621534096 = 2129345^2 + 1052436^2 .

It is a cyclic number.

It is not a de Polignac number, because 5641731663121 - 2⁷ = 5641731662993 is a prime.

It is not a weakly prime, because it can be changed into another prime (5641731663521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2820865831560 + 2820865831561.

It is an arithmetic number, because the mean of its divisors is an integer number (2820865831561).

Almost surely, 2^{5641731663121} is an apocalyptic number.

It is an amenable number.

5641731663121 is a deficient number, since it is larger than the sum of its proper divisors (1).

5641731663121 is an equidigital number, since it uses as much as digits as its factorization.

5641731663121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 46.

The spelling of 5641731663121 in words is "five trillion, six hundred forty-one billion, seven hundred thirty-one million, six hundred sixty-three thousand, one hundred twenty-one".