99844145456 has 80 divisors (see below), whose sum is σ = 222340947840. Its totient is φ = 42956444160.

The previous prime is 99844145417. The next prime is 99844145473. The reversal of 99844145456 is 65454144899.

It is a junction number, because it is equal to n+sod(n) for n = 99844145395 and 99844145404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3876236 + ... + 3901908.

It is an arithmetic number, because the mean of its divisors is an integer number (2779261848).

Almost surely, 2^99844145456 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 99844145456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111170473920).

99844145456 is an abundant number, since it is smaller than the sum of its proper divisors (122496802384).

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

99844145456 is a wasteful number, since it uses less digits than its factorization.

99844145456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26874 (or 26868 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 59.

The spelling of 99844145456 in words is "ninety-nine billion, eight hundred forty-four million, one hundred forty-five thousand, four hundred fifty-six".