210018266888049 has 63 divisors (see below), whose sum is σ = 334506061637553. Its totient is φ = 131771993761152.

The previous prime is 210018266888039. The next prime is 210018266888057. The reversal of 210018266888049 is 940888662810012.

The square root of 210018266888049 is 14492007.

It is a perfect power (a square), and thus also a powerful number.

210018266888049 is a `hidden beast` number, since 210 + 0 + 1 + 8 + 266 + 88 + 80 + 4 + 9 = 666.

210018266888049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 11301315998049 + 198716950890000 = 3361743^2 + 14096700^2 .

It is not a de Polignac number, because 210018266888049 - 2¹³ = 210018266879857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210018266888029) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 6651815427 + ... + 6651846999.

Almost surely, 2^{210018266888049} is an apocalyptic number.

210018266888049 is the 14492007-th square number.

210018266888049 is the 7246004-th centered octagonal number.

It is an amenable number.

210018266888049 is a deficient number, since it is larger than the sum of its proper divisors (124487794749504).

210018266888049 is an frugal number, since it uses more digits than its factorization.

210018266888049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63198 (or 31593 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 63.

The spelling of 210018266888049 in words is "two hundred ten trillion, eighteen billion, two hundred sixty-six million, eight hundred eighty-eight thousand, forty-nine".