210520745568 has 72 divisors (see below), whose sum is σ = 684192429648. Its totient is φ = 60148783872.

The previous prime is 210520745563. The next prime is 210520745569. The reversal of 210520745568 is 865547025012.

210520745568 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 20 + 74 + 556 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210520745563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52210471 + ... + 52214502.

It is an arithmetic number, because the mean of its divisors is an integer number (9502672634).

Almost surely, 2^210520745568 is an apocalyptic number.

210520745568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

210520745568 is an abundant number, since it is smaller than the sum of its proper divisors (473671684080).

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

210520745568 is a wasteful number, since it uses less digits than its factorization.

210520745568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104424996 (or 104424985 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 45.

The spelling of 210520745568 in words is "two hundred ten billion, five hundred twenty million, seven hundred forty-five thousand, five hundred sixty-eight".