899420844647808 has 384 divisors, whose sum is σ = 3088367739302400. Its totient is φ = 256941378892800.

The previous prime is 899420844647659. The next prime is 899420844647833. The reversal of 899420844647808 is 808746448024998.

899420844647808 is a `hidden beast` number, since 8 + 9 + 9 + 4 + 2 + 0 + 84 + 464 + 78 + 0 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1220093733 + ... + 1220830683.

It is an arithmetic number, because the mean of its divisors is an integer number (8042624321100).

Almost surely, 2^{899420844647808} 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 899420844647808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544183869651200).

899420844647808 is an abundant number, since it is smaller than the sum of its proper divisors (2188946894654592).

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

899420844647808 is a wasteful number, since it uses less digits than its factorization.

899420844647808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744195 (or 744170 counting only the distinct ones).

The product of its (nonzero) digits is 7134511104, while the sum is 81.

The spelling of 899420844647808 in words is "eight hundred ninety-nine trillion, four hundred twenty billion, eight hundred forty-four million, six hundred forty-seven thousand, eight hundred eight".