210009988445669 has 2 divisors, whose sum is σ = 210009988445670. Its totient is φ = 210009988445668.

The previous prime is 210009988445659. The next prime is 210009988445731. The reversal of 210009988445669 is 966544889900012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200080317750625 + 9929670695044 = 14144975^2 + 3151138^2 .

It is a cyclic number.

It is not a de Polignac number, because 210009988445669 - 2¹⁶ = 210009988380133 is a prime.

It is a super-2 number, since 2×210009988445669² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210009988445659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105004994222834 + 105004994222835.

It is an arithmetic number, because the mean of its divisors is an integer number (105004994222835).

Almost surely, 2^{210009988445669} is an apocalyptic number.

It is an amenable number.

210009988445669 is a deficient number, since it is larger than the sum of its proper divisors (1).

210009988445669 is an equidigital number, since it uses as much as digits as its factorization.

210009988445669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268738560, while the sum is 71.

The spelling of 210009988445669 in words is "two hundred ten trillion, nine billion, nine hundred eighty-eight million, four hundred forty-five thousand, six hundred sixty-nine".