101818727218 has 16 divisors (see below), whose sum is σ = 164482269336. Its totient is φ = 46991583360.

The previous prime is 101818727203. The next prime is 101818727273. The reversal of 101818727218 is 812727818101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 95001417729 + 6817309489 = 308223^2 + 82567^2 .

It is an alternating number because its digits alternate between odd and even.

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 7 ways as a sum of consecutive naturals, for example, 960328 + ... + 1061068.

Almost surely, 2^101818727218 is an apocalyptic number.

101818727218 is a deficient number, since it is larger than the sum of its proper divisors (62663542118).

101818727218 is a wasteful number, since it uses less digits than its factorization.

101818727218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139629.

The product of its (nonzero) digits is 100352, while the sum is 46.

The spelling of 101818727218 in words is "one hundred one billion, eight hundred eighteen million, seven hundred twenty-seven thousand, two hundred eighteen".