1111806618 has 64 divisors (see below), whose sum is σ = 2449259904. Its totient is φ = 334368000.

The previous prime is 1111806589. The next prime is 1111806623. The reversal of 1111806618 is 8166081111.

It is a super-2 number, since 2×1111806618² = 2472227911657195848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 860553 + ... + 861843.

It is an arithmetic number, because the mean of its divisors is an integer number (38269686).

Almost surely, 2^1111806618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111806618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224629952).

1111806618 is an abundant number, since it is smaller than the sum of its proper divisors (1337453286).

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

1111806618 is a wasteful number, since it uses less digits than its factorization.

1111806618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551.

The product of its (nonzero) digits is 2304, while the sum is 33.

The square root of 1111806618 is about 33343.7643045892. The cubic root of 1111806618 is about 1035.9602337365.

Adding to 1111806618 its reverse (8166081111), we get a palindrome (9277887729).

The spelling of 1111806618 in words is "one billion, one hundred eleven million, eight hundred six thousand, six hundred eighteen".