818197632 has 256 divisors, whose sum is σ = 2851430400. Its totient is φ = 226022400.

The previous prime is 818197621. The next prime is 818197643. The reversal of 818197632 is 236791818.

818197632 is a `hidden beast` number, since 8 + 1 + 8 + 1 + 9 + 7 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (818197621) and next prime (818197643).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

Its product of digits (145152) is a multiple of the sum of its prime divisors (1134).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 749407 + ... + 750497.

It is an arithmetic number, because the mean of its divisors is an integer number (11138400).

Almost surely, 2^818197632 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 818197632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425715200).

818197632 is an abundant number, since it is smaller than the sum of its proper divisors (2033232768).

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

818197632 is a wasteful number, since it uses less digits than its factorization.

818197632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1152 (or 1134 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 818197632 is about 28604.1541039060. The cubic root of 818197632 is about 935.3038874192.

The spelling of 818197632 in words is "eight hundred eighteen million, one hundred ninety-seven thousand, six hundred thirty-two".