845440478208 has 220 divisors, whose sum is σ = 2572298847360. Its totient is φ = 276494819328.

The previous prime is 845440478137. The next prime is 845440478209. The reversal of 845440478208 is 802874044548.

845440478208 is a `hidden beast` number, since 8 + 4 + 544 + 0 + 4 + 78 + 20 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (845440478209) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4299873 + ... + 4492191.

It is an arithmetic number, because the mean of its divisors is an integer number (11692267488).

Almost surely, 2^845440478208 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 845440478208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1286149423680).

845440478208 is an abundant number, since it is smaller than the sum of its proper divisors (1726858369152).

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

845440478208 is a wasteful number, since it uses less digits than its factorization.

845440478208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192404 (or 192377 counting only the distinct ones).

The product of its (nonzero) digits is 9175040, while the sum is 54.

The spelling of 845440478208 in words is "eight hundred forty-five billion, four hundred forty million, four hundred seventy-eight thousand, two hundred eight".