1641275139109 has 2 divisors, whose sum is σ = 1641275139110. Its totient is φ = 1641275139108.

The previous prime is 1641275139029. The next prime is 1641275139143. The reversal of 1641275139109 is 9019315721461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1619057746084 + 22217393025 = 1272422^2 + 149055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641275139109 - 2⁷ = 1641275138981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1641275139149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820637569554 + 820637569555.

It is an arithmetic number, because the mean of its divisors is an integer number (820637569555).

Almost surely, 2^{1641275139109} is an apocalyptic number.

It is an amenable number.

1641275139109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641275139109 is an equidigital number, since it uses as much as digits as its factorization.

1641275139109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 1641275139109 in words is "one trillion, six hundred forty-one billion, two hundred seventy-five million, one hundred thirty-nine thousand, one hundred nine".