7178216856 has 16 divisors (see below), whose sum is σ = 17945542200. Its totient is φ = 2392738944.

The previous prime is 7178216839. The next prime is 7178216869. The reversal of 7178216856 is 6586128717.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7178216799 and 7178216808.

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, 149546161 + ... + 149546208.

Almost surely, 2^7178216856 is an apocalyptic number.

It is an amenable number.

7178216856 is an abundant number, since it is smaller than the sum of its proper divisors (10767325344).

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

7178216856 is a wasteful number, since it uses less digits than its factorization.

7178216856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299092378 (or 299092374 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The square root of 7178216856 is about 84724.3581032043. The cubic root of 7178216856 is about 1929.0294507174.

The spelling of 7178216856 in words is "seven billion, one hundred seventy-eight million, two hundred sixteen thousand, eight hundred fifty-six".