201998168731633 has 4 divisors (see below), whose sum is σ = 204843213361728. Its totient is φ = 199153124101540.

The previous prime is 201998168731631. The next prime is 201998168731649. The reversal of 201998168731633 is 336137861899102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201998168731633 - 2¹ = 201998168731631 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201998168731631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1422522314941 + ... + 1422522315082.

It is an arithmetic number, because the mean of its divisors is an integer number (51210803340432).

Almost surely, 2^{201998168731633} is an apocalyptic number.

It is an amenable number.

201998168731633 is a deficient number, since it is larger than the sum of its proper divisors (2845044630095).

201998168731633 is an equidigital number, since it uses as much as digits as its factorization.

201998168731633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2845044630094.

The product of its (nonzero) digits is 70543872, while the sum is 67.

The spelling of 201998168731633 in words is "two hundred one trillion, nine hundred ninety-eight billion, one hundred sixty-eight million, seven hundred thirty-one thousand, six hundred thirty-three".