201865985206 has 32 divisors (see below), whose sum is σ = 334673927712. Its totient is φ = 90913052160.

The previous prime is 201865985197. The next prime is 201865985263. The reversal of 201865985206 is 602589568102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1238556 + ... + 1392031.

It is an arithmetic number, because the mean of its divisors is an integer number (10458560241).

Almost surely, 2^201865985206 is an apocalyptic number.

201865985206 is a deficient number, since it is larger than the sum of its proper divisors (132807942506).

201865985206 is a wasteful number, since it uses less digits than its factorization.

201865985206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2630704.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 201865985206 in words is "two hundred one billion, eight hundred sixty-five million, nine hundred eighty-five thousand, two hundred six".