211040696595409 has 2 divisors, whose sum is σ = 211040696595410. Its totient is φ = 211040696595408.

The previous prime is 211040696595367. The next prime is 211040696595481. The reversal of 211040696595409 is 904595696040112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108361791631809 + 102678904963600 = 10409697^2 + 10133060^2 .

It is a cyclic number.

It is not a de Polignac number, because 211040696595409 - 2²⁷ = 211040562377681 is a prime.

It is not a weakly prime, because it can be changed into another prime (211040696595499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105520348297704 + 105520348297705.

It is an arithmetic number, because the mean of its divisors is an integer number (105520348297705).

Almost surely, 2^{211040696595409} is an apocalyptic number.

It is an amenable number.

211040696595409 is a deficient number, since it is larger than the sum of its proper divisors (1).

211040696595409 is an equidigital number, since it uses as much as digits as its factorization.

211040696595409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20995200, while the sum is 61.

The spelling of 211040696595409 in words is "two hundred eleven trillion, forty billion, six hundred ninety-six million, five hundred ninety-five thousand, four hundred nine".