201310682661 has 24 divisors (see below), whose sum is σ = 317272964736. Its totient is φ = 121984885440.

The previous prime is 201310682557. The next prime is 201310682689. The reversal of 201310682661 is 166286013102.

It is a happy number.

201310682661 is a `hidden beast` number, since 20 + 1 + 310 + 68 + 266 + 1 = 666.

It is not a de Polignac number, because 201310682661 - 2³⁰ = 200236940837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201310681661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391521 + ... + 745593.

It is an arithmetic number, because the mean of its divisors is an integer number (13219706864).

Almost surely, 2^201310682661 is an apocalyptic number.

It is an amenable number.

201310682661 is a deficient number, since it is larger than the sum of its proper divisors (115962282075).

201310682661 is a wasteful number, since it uses less digits than its factorization.

201310682661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359833 (or 359830 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

Adding to 201310682661 its reverse (166286013102), we get a palindrome (367596695763).

The spelling of 201310682661 in words is "two hundred one billion, three hundred ten million, six hundred eighty-two thousand, six hundred sixty-one".