818671650 has 24 divisors (see below), whose sum is σ = 2030306064. Its totient is φ = 218312400.

The previous prime is 818671631. The next prime is 818671661. The reversal of 818671650 is 56176818.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2728756 + ... + 2729055.

It is an arithmetic number, because the mean of its divisors is an integer number (84596086).

Almost surely, 2^818671650 is an apocalyptic number.

818671650 is an abundant number, since it is smaller than the sum of its proper divisors (1211634414).

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

818671650 is a wasteful number, since it uses less digits than its factorization.

818671650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457826 (or 5457821 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 818671650 is about 28612.4387286369. The cubic root of 818671650 is about 935.4844734906.

The spelling of 818671650 in words is "eight hundred eighteen million, six hundred seventy-one thousand, six hundred fifty".