201236850609 has 16 divisors (see below), whose sum is σ = 268938558720. Its totient is φ = 133846626320.

The previous prime is 201236850599. The next prime is 201236850611. The reversal of 201236850609 is 906058632102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201236850609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201236850109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11438782 + ... + 11456360.

It is an arithmetic number, because the mean of its divisors is an integer number (16808659920).

Almost surely, 2^201236850609 is an apocalyptic number.

It is an amenable number.

201236850609 is a deficient number, since it is larger than the sum of its proper divisors (67701708111).

201236850609 is a wasteful number, since it uses less digits than its factorization.

201236850609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26220.

The product of its (nonzero) digits is 155520, while the sum is 42.

The spelling of 201236850609 in words is "two hundred one billion, two hundred thirty-six million, eight hundred fifty thousand, six hundred nine".