616440812217 has 8 divisors (see below), whose sum is σ = 822226300224. Its totient is φ = 410807932848.

The previous prime is 616440812177. The next prime is 616440812219. The reversal of 616440812217 is 712218044616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 616440812217 - 2¹⁰ = 616440811193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616440812219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38142733 + ... + 38158890.

It is an arithmetic number, because the mean of its divisors is an integer number (102778287528).

Almost surely, 2^616440812217 is an apocalyptic number.

It is an amenable number.

616440812217 is a deficient number, since it is larger than the sum of its proper divisors (205785488007).

616440812217 is a wasteful number, since it uses less digits than its factorization.

616440812217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76304319.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 616440812217 in words is "six hundred sixteen billion, four hundred forty million, eight hundred twelve thousand, two hundred seventeen".