899873245440 has 2592 divisors, whose sum is σ = 3970277700480. Its totient is φ = 193778417664.

The previous prime is 899873245343. The next prime is 899873245441. The reversal of 899873245440 is 44542378998.

899873245440 is a `hidden beast` number, since 8 + 9 + 9 + 87 + 3 + 2 + 4 + 544 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2592).

It is not an unprimeable number, because it can be changed into a prime (899873245441) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 16978740454 + ... + 16978740506.

It is an arithmetic number, because the mean of its divisors is an integer number (1531742940).

Almost surely, 2^899873245440 is an apocalyptic number.

899873245440 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 899873245440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985138850240).

899873245440 is an abundant number, since it is smaller than the sum of its proper divisors (3070404455040).

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

899873245440 is a wasteful number, since it uses less digits than its factorization.

899873245440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 899873245440 in words is "eight hundred ninety-nine billion, eight hundred seventy-three million, two hundred forty-five thousand, four hundred forty".