999415220000 has 90 divisors (see below), whose sum is σ = 2459059218693. Its totient is φ = 399709536000.

The previous prime is 999415219963. The next prime is 999415220039. The reversal of 999415220000 is 22514999.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 8 ways, for example, as 178499490064 + 820915729936 = 422492^2 + 906044^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=706900.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 999415220000.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 141376466 + ... + 141383534.

Almost surely, 2^999415220000 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 999415220000

999415220000 is an abundant number, since it is smaller than the sum of its proper divisors (1459643998693).

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

999415220000 is an frugal number, since it uses more digits than its factorization.

999415220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14168 (or 7076 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

Adding to 999415220000 its reverse (22514999), we get a palindrome (999437734999).

The spelling of 999415220000 in words is "nine hundred ninety-nine billion, four hundred fifteen million, two hundred twenty thousand".