818315942400 has 720 divisors, whose sum is σ = 3205685010528. Its totient is φ = 197701632000.

The previous prime is 818315942399. The next prime is 818315942407. The reversal of 818315942400 is 4249513818.

818315942400 is a `hidden beast` number, since 8 + 1 + 8 + 31 + 594 + 24 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

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

It is not an unprimeable number, because it can be changed into a prime (818315942407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 439717470 + ... + 439719330.

Almost surely, 2^818315942400 is an apocalyptic number.

818315942400 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818315942400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602842505264).

818315942400 is an abundant number, since it is smaller than the sum of its proper divisors (2387369068128).

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

818315942400 is a wasteful number, since it uses less digits than its factorization.

818315942400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2253 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 818315942400 in words is "eight hundred eighteen billion, three hundred fifteen million, nine hundred forty-two thousand, four hundred".