818680680 has 96 divisors (see below), whose sum is σ = 2667024360. Its totient is φ = 217797120.

The previous prime is 818680673. The next prime is 818680691. The reversal of 818680680 is 86086818.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 517380516 + 301300164 = 22746^2 + 17358^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 163494 + ... + 168426.

Almost surely, 2^818680680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818680680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1333512180).

818680680 is an abundant number, since it is smaller than the sum of its proper divisors (1848343680).

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

818680680 is a wasteful number, since it uses less digits than its factorization.

818680680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5411 (or 5404 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 818680680 is about 28612.5965267048. The cubic root of 818680680 is about 935.4879129622.

The spelling of 818680680 in words is "eight hundred eighteen million, six hundred eighty thousand, six hundred eighty".