201984591944 has 16 divisors (see below), whose sum is σ = 380013677820. Its totient is φ = 100647611200.

The previous prime is 201984591931. The next prime is 201984591967. The reversal of 201984591944 is 449195489102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 168213179044 + 33771412900 = 410138^2 + 183770^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 201984591944.

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, 43083107 + ... + 43087794.

Almost surely, 2^201984591944 is an apocalyptic number.

It is an amenable number.

201984591944 is a deficient number, since it is larger than the sum of its proper divisors (178029085876).

201984591944 is a wasteful number, since it uses less digits than its factorization.

201984591944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86171200 (or 86171196 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The spelling of 201984591944 in words is "two hundred one billion, nine hundred eighty-four million, five hundred ninety-one thousand, nine hundred forty-four".