201885494669172 has 36 divisors (see below), whose sum is σ = 515582715203556. Its totient is φ = 66601400302080.

The previous prime is 201885494669167. The next prime is 201885494669191. The reversal of 201885494669172 is 271966494588102.

It is a happy number.

201885494669172 is a `hidden beast` number, since 2 + 0 + 1 + 8 + 8 + 5 + 4 + 9 + 466 + 91 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31545251978256 + 170340242690916 = 5616516^2 + 13051446^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 201885494669172.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28906854279 + ... + 28906861262.

Almost surely, 2^{201885494669172} is an apocalyptic number.

It is an amenable number.

201885494669172 is an abundant number, since it is smaller than the sum of its proper divisors (313697220534384).

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

201885494669172 is a wasteful number, since it uses less digits than its factorization.

201885494669172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57813715648 (or 57813715643 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 72.

The spelling of 201885494669172 in words is "two hundred one trillion, eight hundred eighty-five billion, four hundred ninety-four million, six hundred sixty-nine thousand, one hundred seventy-two".