6181818 has 16 divisors (see below), whose sum is σ = 12480480. Its totient is φ = 2041136.

The previous prime is 6181811. The next prime is 6181831. The reversal of 6181818 is 8181816.

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

6181818 is a modest number, since divided by 1818 gives 618 as remainder.

It is not an unprimeable number, because it can be changed into a prime (6181811) 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, 4173 + ... + 5456.

It is an arithmetic number, because the mean of its divisors is an integer number (780030).

Almost surely, 2^6181818 is an apocalyptic number.

6181818 is an abundant number, since it is smaller than the sum of its proper divisors (6298662).

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

6181818 is a wasteful number, since it uses less digits than its factorization.

6181818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9741.

The product of its digits is 3072, while the sum is 33.

The square root of 6181818 is about 2486.3262054686. The cubic root of 6181818 is about 183.5292986304.

The spelling of 6181818 in words is "six million, one hundred eighty-one thousand, eight hundred eighteen".