201641312566 has 8 divisors (see below), whose sum is σ = 303216239304. Its totient is φ = 100569232800.

The previous prime is 201641312557. The next prime is 201641312569. The reversal of 201641312566 is 665213146102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201641312569) 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, 125710740 + ... + 125712343.

It is an arithmetic number, because the mean of its divisors is an integer number (37902029913).

Almost surely, 2^201641312566 is an apocalyptic number.

201641312566 is a deficient number, since it is larger than the sum of its proper divisors (101574926738).

201641312566 is a wasteful number, since it uses less digits than its factorization.

201641312566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251423486.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 201641312566 its reverse (665213146102), we get a palindrome (866854458668).

The spelling of 201641312566 in words is "two hundred one billion, six hundred forty-one million, three hundred twelve thousand, five hundred sixty-six".