211204400168 has 8 divisors (see below), whose sum is σ = 396008250330. Its totient is φ = 105602200080.

The previous prime is 211204400167. The next prime is 211204400203. The reversal of 211204400168 is 861004402112.

It can be written as a sum of positive squares in only one way, i.e., 151540475524 + 59663924644 = 389282^2 + 244262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 211204400168.

It is not an unprimeable number, because it can be changed into a prime (211204400167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13200275003 + ... + 13200275018.

Almost surely, 2^211204400168 is an apocalyptic number.

It is an amenable number.

211204400168 is a deficient number, since it is larger than the sum of its proper divisors (184803850162).

211204400168 is a wasteful number, since it uses less digits than its factorization.

211204400168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26400550027 (or 26400550023 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The spelling of 211204400168 in words is "two hundred eleven billion, two hundred four million, four hundred thousand, one hundred sixty-eight".