1216612683 has 32 divisors (see below), whose sum is σ = 2117498880. Its totient is φ = 680620320.

The previous prime is 1216612681. The next prime is 1216612687. The reversal of 1216612683 is 3862166121.

It is a happy number.

It is not a de Polignac number, because 1216612683 - 2¹ = 1216612681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216612681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153691 + ... + 161412.

It is an arithmetic number, because the mean of its divisors is an integer number (66171840).

Almost surely, 2^1216612683 is an apocalyptic number.

1216612683 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1216612683 is a deficient number, since it is larger than the sum of its proper divisors (900886197).

1216612683 is a wasteful number, since it uses less digits than its factorization.

1216612683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315136 (or 315130 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1216612683 is about 34879.9753870326. The cubic root of 1216612683 is about 1067.5398930222.

The spelling of 1216612683 in words is "one billion, two hundred sixteen million, six hundred twelve thousand, six hundred eighty-three".