8210866550 has 48 divisors (see below), whose sum is σ = 16254687312. Its totient is φ = 3075072000.

The previous prime is 8210866537. The next prime is 8210866561. The reversal of 8210866550 is 556680128.

It is a junction number, because it is equal to n+sod(n) for n = 8210866498 and 8210866507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139025 + ... + 189075.

It is an arithmetic number, because the mean of its divisors is an integer number (338639319).

Almost surely, 2^8210866550 is an apocalyptic number.

8210866550 is a deficient number, since it is larger than the sum of its proper divisors (8043820762).

8210866550 is a wasteful number, since it uses less digits than its factorization.

8210866550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50273 (or 50268 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 8210866550 is about 90613.8320015217. The cubic root of 8210866550 is about 2017.4200430296.

The spelling of 8210866550 in words is "eight billion, two hundred ten million, eight hundred sixty-six thousand, five hundred fifty".