216720276056 has 16 divisors (see below), whose sum is σ = 406500669240. Its totient is φ = 108320097600.

The previous prime is 216720276049. The next prime is 216720276127. The reversal of 216720276056 is 650672027612.

216720276056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216720275998 and 216720276016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4982045 + ... + 5025356.

Almost surely, 2^216720276056 is an apocalyptic number.

It is an amenable number.

216720276056 is a deficient number, since it is larger than the sum of its proper divisors (189780393184).

216720276056 is a wasteful number, since it uses less digits than its factorization.

216720276056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010114 (or 10010110 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 216720276056 in words is "two hundred sixteen billion, seven hundred twenty million, two hundred seventy-six thousand, fifty-six".