201568361872 has 20 divisors (see below), whose sum is σ = 404005553820. Its totient is φ = 97308864128.

The previous prime is 201568361857. The next prime is 201568361899. The reversal of 201568361872 is 278163865102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 164070363136 + 37497998736 = 405056^2 + 193644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217206823 + ... + 217207750.

It is an arithmetic number, because the mean of its divisors is an integer number (20200277691).

Almost surely, 2^201568361872 is an apocalyptic number.

It is an amenable number.

201568361872 is an abundant number, since it is smaller than the sum of its proper divisors (202437191948).

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

201568361872 is a wasteful number, since it uses less digits than its factorization.

201568361872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434414610 (or 434414604 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 201568361872 in words is "two hundred one billion, five hundred sixty-eight million, three hundred sixty-one thousand, eight hundred seventy-two".