999995273800 has 192 divisors, whose sum is σ = 2597848459200. Its totient is φ = 355756032000.

The previous prime is 999995273791. The next prime is 999995273801. The reversal of 999995273800 is 8372599999.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 999995273800.

It is not an unprimeable number, because it can be changed into a prime (999995273801) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 25885299 + ... + 25923901.

It is an arithmetic number, because the mean of its divisors is an integer number (13530460725).

Almost surely, 2^999995273800 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 999995273800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298924229600).

999995273800 is an abundant number, since it is smaller than the sum of its proper divisors (1597853185400).

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

999995273800 is a wasteful number, since it uses less digits than its factorization.

999995273800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39056 (or 39047 counting only the distinct ones).

The product of its (nonzero) digits is 99202320, while the sum is 70.

The spelling of 999995273800 in words is "nine hundred ninety-nine billion, nine hundred ninety-five million, two hundred seventy-three thousand, eight hundred".