1216006918 has 32 divisors (see below), whose sum is σ = 2205895680. Its totient is φ = 491457120.

The previous prime is 1216006907. The next prime is 1216006937. The reversal of 1216006918 is 8196006121.

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, 3733 + ... + 49456.

It is an arithmetic number, because the mean of its divisors is an integer number (68934240).

Almost surely, 2^1216006918 is an apocalyptic number.

1216006918 is a deficient number, since it is larger than the sum of its proper divisors (989888762).

1216006918 is a wasteful number, since it uses less digits than its factorization.

1216006918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53292.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1216006918 is about 34871.2907418122. The cubic root of 1216006918 is about 1067.3626836080.

The spelling of 1216006918 in words is "one billion, two hundred sixteen million, six thousand, nine hundred eighteen".