818505450 has 144 divisors (see below), whose sum is σ = 2527873920. Its totient is φ = 185996160.

The previous prime is 818505449. The next prime is 818505463. The reversal of 818505450 is 54505818.

818505450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 619891 + ... + 621209.

It is an arithmetic number, because the mean of its divisors is an integer number (17554680).

Almost surely, 2^818505450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818505450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1263936960).

818505450 is an abundant number, since it is smaller than the sum of its proper divisors (1709368470).

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

818505450 is a wasteful number, since it uses less digits than its factorization.

818505450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1533 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 36.

The square root of 818505450 is about 28609.5342499664. The cubic root of 818505450 is about 935.4211644126.

The spelling of 818505450 in words is "eight hundred eighteen million, five hundred five thousand, four hundred fifty".