68181818130861 has 8 divisors (see below), whose sum is σ = 90911241025440. Its totient is φ = 45453470328432.

The previous prime is 68181818130859. The next prime is 68181818130901. The reversal of 68181818130861 is 16803181818186.

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

It is not a de Polignac number, because 68181818130861 - 2¹ = 68181818130859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68181818130795 and 68181818130804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68181818137861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268625046 + ... + 268878743.

It is an arithmetic number, because the mean of its divisors is an integer number (11363905128180).

Almost surely, 2^{68181818130861} is an apocalyptic number.

It is an amenable number.

68181818130861 is a deficient number, since it is larger than the sum of its proper divisors (22729422894579).

68181818130861 is a wasteful number, since it uses less digits than its factorization.

68181818130861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537546075.

The product of its (nonzero) digits is 3538944, while the sum is 60.

The spelling of 68181818130861 in words is "sixty-eight trillion, one hundred eighty-one billion, eight hundred eighteen million, one hundred thirty thousand, eight hundred sixty-one".