1216065914 has 32 divisors (see below), whose sum is σ = 2126113920. Its totient is φ = 510916608.

The previous prime is 1216065899. The next prime is 1216065931. The reversal of 1216065914 is 4195606121.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141122 + ... + 149490.

It is an arithmetic number, because the mean of its divisors is an integer number (66441060).

Almost surely, 2^1216065914 is an apocalyptic number.

1216065914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1216065914 is a deficient number, since it is larger than the sum of its proper divisors (910048006).

1216065914 is a wasteful number, since it uses less digits than its factorization.

1216065914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1216065914 is about 34872.1366423109. The cubic root of 1216065914 is about 1067.3799447792.

The spelling of 1216065914 in words is "one billion, two hundred sixteen million, sixty-five thousand, nine hundred fourteen".