201281116666368 has 120 divisors (see below), whose sum is σ = 549623143992384. Its totient is φ = 65457272872960.

The previous prime is 201281116666367. The next prime is 201281116666453. The reversal of 201281116666368 is 863666611182102.

It is a happy number.

It is a super-2 number, since 2×201281116666368² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201281116666367) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36395496 + ... + 41559527.

Almost surely, 2^{201281116666368} is an apocalyptic number.

It is an amenable number.

201281116666368 is an abundant number, since it is smaller than the sum of its proper divisors (348342027326016).

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

201281116666368 is an frugal number, since it uses more digits than its factorization.

201281116666368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77955126 (or 77955069 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 201281116666368 in words is "two hundred one trillion, two hundred eighty-one billion, one hundred sixteen million, six hundred sixty-six thousand, three hundred sixty-eight".