200171681618 has 8 divisors (see below), whose sum is σ = 300380234112. Its totient is φ = 100044936916.

The previous prime is 200171681609. The next prime is 200171681621. The reversal of 200171681618 is 816186171002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20445830 + ... + 20455617.

It is an arithmetic number, because the mean of its divisors is an integer number (37547529264).

Almost surely, 2^200171681618 is an apocalyptic number.

200171681618 is a deficient number, since it is larger than the sum of its proper divisors (100208552494).

200171681618 is a wasteful number, since it uses less digits than its factorization.

200171681618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40903896.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 200171681618 in words is "two hundred billion, one hundred seventy-one million, six hundred eighty-one thousand, six hundred eighteen".