201565966504 has 32 divisors (see below), whose sum is σ = 432494740800. Its totient is φ = 86271880320.

The previous prime is 201565966471. The next prime is 201565966529. The reversal of 201565966504 is 405669565102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322294 + ... + 2407525.

It is an arithmetic number, because the mean of its divisors is an integer number (13515460650).

Almost surely, 2^201565966504 is an apocalyptic number.

It is an amenable number.

201565966504 is an abundant number, since it is smaller than the sum of its proper divisors (230928774296).

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

201565966504 is a wasteful number, since it uses less digits than its factorization.

201565966504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730593 (or 4730589 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 201565966504 in words is "two hundred one billion, five hundred sixty-five million, nine hundred sixty-six thousand, five hundred four".