612543216 has 20 divisors (see below), whose sum is σ = 1582403432. Its totient is φ = 204181056.

The previous prime is 612543209. The next prime is 612543227. The reversal of 612543216 is 612345216.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

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, 6380611 + ... + 6380706.

Almost surely, 2^612543216 is an apocalyptic number.

It is an amenable number.

612543216 is an abundant number, since it is smaller than the sum of its proper divisors (969860216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

612543216 is a wasteful number, since it uses less digits than its factorization.

612543216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12761328 (or 12761322 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 612543216 is about 24749.6104211763. The cubic root of 612543216 is about 849.2695990780.

The spelling of 612543216 in words is "six hundred twelve million, five hundred forty-three thousand, two hundred sixteen".