1216546612 has 12 divisors (see below), whose sum is σ = 2140720036. Its totient is φ = 604912320.

The previous prime is 1216546603. The next prime is 1216546619. The reversal of 1216546612 is 2166456121.

It can be written as a sum of positive squares in 2 ways, for example, as 585833616 + 630712996 = 24204^2 + 25114^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216546619) 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 3 ways as a sum of consecutive naturals, for example, 839433 + ... + 840880.

Almost surely, 2^1216546612 is an apocalyptic number.

It is an amenable number.

1216546612 is a deficient number, since it is larger than the sum of its proper divisors (924173424).

1216546612 is a wasteful number, since it uses less digits than its factorization.

1216546612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680498 (or 1680496 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 1216546612 is about 34879.0282548124. The cubic root of 1216546612 is about 1067.5205675880.

The spelling of 1216546612 in words is "one billion, two hundred sixteen million, five hundred forty-six thousand, six hundred twelve".