216760778 has 64 divisors (see below), whose sum is σ = 398442240. Its totient is φ = 87340032.

The previous prime is 216760741. The next prime is 216760787. The reversal of 216760778 is 877067612.

216760778 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444851 + ... + 445337.

It is an arithmetic number, because the mean of its divisors is an integer number (6225660).

Almost surely, 2^216760778 is an apocalyptic number.

216760778 is a deficient number, since it is larger than the sum of its proper divisors (181681462).

216760778 is a wasteful number, since it uses less digits than its factorization.

216760778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 216760778 is about 14722.7978998559. The cubic root of 216760778 is about 600.7035986664.

The spelling of 216760778 in words is "two hundred sixteen million, seven hundred sixty thousand, seven hundred seventy-eight".