210564563312542 has 24 divisors (see below), whose sum is σ = 323376523376400. Its totient is φ = 102829537056960.

The previous prime is 210564563312489. The next prime is 210564563312563. The reversal of 210564563312542 is 245213365465012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87749367 + ... + 90117037.

It is an arithmetic number, because the mean of its divisors is an integer number (13474021807350).

Almost surely, 2^{210564563312542} is an apocalyptic number.

210564563312542 is a deficient number, since it is larger than the sum of its proper divisors (112811960063858).

210564563312542 is a wasteful number, since it uses less digits than its factorization.

210564563312542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391808 (or 2391765 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 49.

The spelling of 210564563312542 in words is "two hundred ten trillion, five hundred sixty-four billion, five hundred sixty-three million, three hundred twelve thousand, five hundred forty-two".