210245566161 has 16 divisors (see below), whose sum is σ = 291260260800. Its totient is φ = 134739503808.

The previous prime is 210245566159. The next prime is 210245566183. The reversal of 210245566161 is 161665542012.

It is not a de Polignac number, because 210245566161 - 2¹ = 210245566159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210245566121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5256531 + ... + 5296376.

It is an arithmetic number, because the mean of its divisors is an integer number (18203766300).

Almost surely, 2^210245566161 is an apocalyptic number.

It is an amenable number.

210245566161 is a deficient number, since it is larger than the sum of its proper divisors (81014694639).

210245566161 is a wasteful number, since it uses less digits than its factorization.

210245566161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553168.

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 210245566161 in words is "two hundred ten billion, two hundred forty-five million, five hundred sixty-six thousand, one hundred sixty-one".