999445449600 has 1728 divisors, whose sum is σ = 4192081957440. Its totient is φ = 225737441280.

The previous prime is 999445449557. The next prime is 999445449637. The reversal of 999445449600 is 6944544999.

999445449600 is a `hidden beast` number, since 9 + 9 + 94 + 4 + 54 + 496 + 0 + 0 = 666.

It is a super-2 number, since 2×999445449600² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 215 ways as a sum of consecutive naturals, for example, 3888892672 + ... + 3888892928.

It is an arithmetic number, because the mean of its divisors is an integer number (2425973355).

Almost surely, 2^999445449600 is an apocalyptic number.

999445449600 is a gapful number since it is divisible by the number (90) 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 999445449600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096040978720).

999445449600 is an abundant number, since it is smaller than the sum of its proper divisors (3192636507840).

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

999445449600 is a wasteful number, since it uses less digits than its factorization.

999445449600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 999445449600 in words is "nine hundred ninety-nine billion, four hundred forty-five million, four hundred forty-nine thousand, six hundred".