201865936668 has 48 divisors (see below), whose sum is σ = 514134276096. Its totient is φ = 61136530560.

The previous prime is 201865936667. The next prime is 201865936687. The reversal of 201865936668 is 866639568102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201865936667) 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, 204796 + ... + 667587.

It is an arithmetic number, because the mean of its divisors is an integer number (10711130752).

Almost surely, 2^201865936668 is an apocalyptic number.

It is an amenable number.

201865936668 is an abundant number, since it is smaller than the sum of its proper divisors (312268339428).

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

201865936668 is a wasteful number, since it uses less digits than its factorization.

201865936668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874154 (or 874152 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 201865936668 in words is "two hundred one billion, eight hundred sixty-five million, nine hundred thirty-six thousand, six hundred sixty-eight".