211161716660000 has 60 divisors (see below), whose sum is σ = 519489497290302. Its totient is φ = 84464686656000.

The previous prime is 211161716659997. The next prime is 211161716660017. The reversal of 211161716660000 is 66617161112.

It can be written as a sum of positive squares in 5 ways, for example, as 2552108491024 + 208609608168976 = 1597532^2 + 14443324^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5279022917 + ... + 5279062916.

Almost surely, 2^{211161716660000} is an apocalyptic number.

211161716660000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211161716660000 is an abundant number, since it is smaller than the sum of its proper divisors (308327780630302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211161716660000 is an equidigital number, since it uses as much as digits as its factorization.

211161716660000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10558085863 (or 10558085840 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 38.

The spelling of 211161716660000 in words is "two hundred eleven trillion, one hundred sixty-one billion, seven hundred sixteen million, six hundred sixty thousand".