1216854916 has 12 divisors (see below), whose sum is σ = 2129882832. Its totient is φ = 608316968.

The previous prime is 1216854907. The next prime is 1216854941. The reversal of 1216854916 is 6194586121.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291 + ... + 49333.

It is an arithmetic number, because the mean of its divisors is an integer number (177490236).

Almost surely, 2^1216854916 is an apocalyptic number.

It is an amenable number.

1216854916 is a deficient number, since it is larger than the sum of its proper divisors (913027916).

1216854916 is a wasteful number, since it uses less digits than its factorization.

1216854916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55250 (or 55248 counting only the distinct ones).

The product of its digits is 103680, while the sum is 43.

The square root of 1216854916 is about 34883.4475933787. The cubic root of 1216854916 is about 1067.6107389685.

The spelling of 1216854916 in words is "one billion, two hundred sixteen million, eight hundred fifty-four thousand, nine hundred sixteen".