201313643655 has 32 divisors (see below), whose sum is σ = 338765690880. Its totient is φ = 101943354240.

The previous prime is 201313643623. The next prime is 201313643681. The reversal of 201313643655 is 556346313102.

It is not a de Polignac number, because 201313643655 - 2⁵ = 201313643623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4059625 + ... + 4108914.

It is an arithmetic number, because the mean of its divisors is an integer number (10586427840).

Almost surely, 2^201313643655 is an apocalyptic number.

201313643655 is a deficient number, since it is larger than the sum of its proper divisors (137452047225).

201313643655 is a wasteful number, since it uses less digits than its factorization.

201313643655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168631.

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 201313643655 its reverse (556346313102), we get a palindrome (757659956757).

The spelling of 201313643655 in words is "two hundred one billion, three hundred thirteen million, six hundred forty-three thousand, six hundred fifty-five".