818471525040 has 480 divisors, whose sum is σ = 3092199836544. Its totient is φ = 192500858880.

The previous prime is 818471525009. The next prime is 818471525041. The reversal of 818471525040 is 40525174818.

818471525040 is a `hidden beast` number, since 8 + 1 + 84 + 7 + 1 + 525 + 0 + 40 = 666.

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 (818471525041) 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 95 ways as a sum of consecutive naturals, for example, 297300304 + ... + 297303056.

Almost surely, 2^818471525040 is an apocalyptic number.

818471525040 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 818471525040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1546099918272).

818471525040 is an abundant number, since it is smaller than the sum of its proper divisors (2273728311504).

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

818471525040 is a wasteful number, since it uses less digits than its factorization.

818471525040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189 (or 4180 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

Adding to 818471525040 its reverse (40525174818), we get a palindrome (858996699858).

The spelling of 818471525040 in words is "eight hundred eighteen billion, four hundred seventy-one million, five hundred twenty-five thousand, forty".