999938548512 has 240 divisors, whose sum is σ = 3022188539832. Its totient is φ = 324098703360.

The previous prime is 999938548471. The next prime is 999938548547. The reversal of 999938548512 is 215845839999.

It can be written as a sum of positive squares in 4 ways, for example, as 860597603856 + 139340944656 = 927684^2 + 373284^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

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 39 ways as a sum of consecutive naturals, for example, 248677062 + ... + 248681082.

Almost surely, 2^999938548512 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 999938548512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511094269916).

999938548512 is an abundant number, since it is smaller than the sum of its proper divisors (2022249991320).

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

999938548512 is a wasteful number, since it uses less digits than its factorization.

999938548512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673 (or 6656 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 72.

The spelling of 999938548512 in words is "nine hundred ninety-nine billion, nine hundred thirty-eight million, five hundred forty-eight thousand, five hundred twelve".