216560620506 has 8 divisors (see below), whose sum is σ = 433121241024. Its totient is φ = 72186873500.

The previous prime is 216560620453. The next prime is 216560620547. The reversal of 216560620506 is 605026065612.

It is a happy number.

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

216560620506 is an admirable number.

It is a Curzon 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, 18046718370 + ... + 18046718381.

It is an arithmetic number, because the mean of its divisors is an integer number (54140155128).

Almost surely, 2^216560620506 is an apocalyptic number.

216560620506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216560620506 is a wasteful number, since it uses less digits than its factorization.

216560620506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36093436756.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 216560620506 in words is "two hundred sixteen billion, five hundred sixty million, six hundred twenty thousand, five hundred six".