1216646314 has 32 divisors (see below), whose sum is σ = 1984666320. Its totient is φ = 556042752.

The previous prime is 1216646311. The next prime is 1216646359. The reversal of 1216646314 is 4136466121.

It can be written as a sum of positive squares in 8 ways, for example, as 722695689 + 493950625 = 26883^2 + 22225^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1216646314.

It is not an unprimeable number, because it can be changed into a prime (1216646311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386844 + ... + 1387720.

Almost surely, 2^1216646314 is an apocalyptic number.

1216646314 is a deficient number, since it is larger than the sum of its proper divisors (768020006).

1216646314 is a wasteful number, since it uses less digits than its factorization.

1216646314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1354.

The product of its digits is 20736, while the sum is 34.

The square root of 1216646314 is about 34880.4574797981. The cubic root of 1216646314 is about 1067.5497296513.

The spelling of 1216646314 in words is "one billion, two hundred sixteen million, six hundred forty-six thousand, three hundred fourteen".