1816689116 has 48 divisors (see below), whose sum is σ = 3503512320. Its totient is φ = 817413120.

The previous prime is 1816689107. The next prime is 1816689151. The reversal of 1816689116 is 6119866181.

It is a super-3 number, since 3×1816689116³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3148220 + ... + 3148796.

It is an arithmetic number, because the mean of its divisors is an integer number (72989840).

Almost surely, 2^1816689116 is an apocalyptic number.

It is an amenable number.

1816689116 is a deficient number, since it is larger than the sum of its proper divisors (1686823204).

1816689116 is a wasteful number, since it uses less digits than its factorization.

1816689116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194 (or 1192 counting only the distinct ones).

The product of its digits is 124416, while the sum is 47.

The square root of 1816689116 is about 42622.6361925210. The cubic root of 1816689116 is about 1220.1883423279.

The spelling of 1816689116 in words is "one billion, eight hundred sixteen million, six hundred eighty-nine thousand, one hundred sixteen".