216768756 has 24 divisors (see below), whose sum is σ = 511479360. Its totient is φ = 71444032.

The previous prime is 216768743. The next prime is 216768779. The reversal of 216768756 is 657867612.

216768756 = 66² + 67² + ... + 866².

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100416 + ... + 102551.

It is an arithmetic number, because the mean of its divisors is an integer number (21311640).

Almost surely, 2^216768756 is an apocalyptic number.

It is an amenable number.

216768756 is an abundant number, since it is smaller than the sum of its proper divisors (294710604).

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

216768756 is a wasteful number, since it uses less digits than its factorization.

216768756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203063 (or 203061 counting only the distinct ones).

The product of its digits is 846720, while the sum is 48.

The square root of 216768756 is about 14723.0688377118. The cubic root of 216768756 is about 600.7109683184.

The spelling of 216768756 in words is "two hundred sixteen million, seven hundred sixty-eight thousand, seven hundred fifty-six".