818807616 has 280 divisors, whose sum is σ = 2695248864. Its totient is φ = 243717120.

The previous prime is 818807611. The next prime is 818807621. The reversal of 818807616 is 616708818.

It is an interprime number because it is at equal distance from previous prime (818807611) and next prime (818807621).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818807611) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4732906 + ... + 4733078.

Almost surely, 2^818807616 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 818807616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347624432).

818807616 is an abundant number, since it is smaller than the sum of its proper divisors (1876441248).

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

818807616 is a wasteful number, since it uses less digits than its factorization.

818807616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 272 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 818807616 is about 28614.8146245961. The cubic root of 818807616 is about 935.5362594299.

The spelling of 818807616 in words is "eight hundred eighteen million, eight hundred seven thousand, six hundred sixteen".