918181818646 has 8 divisors (see below), whose sum is σ = 1377347403960. Its totient is φ = 459066017328.

The previous prime is 918181818643. The next prime is 918181818647. The reversal of 918181818646 is 646818181819.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918181818643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12399856 + ... + 12473683.

It is an arithmetic number, because the mean of its divisors is an integer number (172168425495).

Almost surely, 2^918181818646 is an apocalyptic number.

918181818646 is a deficient number, since it is larger than the sum of its proper divisors (459165585314).

918181818646 is a wasteful number, since it uses less digits than its factorization.

918181818646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24891998.

The product of its digits is 5308416, while the sum is 61.

The spelling of 918181818646 in words is "nine hundred eighteen billion, one hundred eighty-one million, eight hundred eighteen thousand, six hundred forty-six".