201381866718 has 64 divisors (see below), whose sum is σ = 414212527872. Its totient is φ = 65235824640.

The previous prime is 201381866717. The next prime is 201381866753. The reversal of 201381866718 is 817668183102.

It is a happy number.

201381866718 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201381866713) by changing a digit.

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, 44939038 + ... + 44943518.

It is an arithmetic number, because the mean of its divisors is an integer number (6472070748).

Almost surely, 2^201381866718 is an apocalyptic number.

201381866718 is an abundant number, since it is smaller than the sum of its proper divisors (212830661154).

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

201381866718 is a wasteful number, since it uses less digits than its factorization.

201381866718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369.

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 201381866718 in words is "two hundred one billion, three hundred eighty-one million, eight hundred sixty-six thousand, seven hundred eighteen".