994409943520 has 576 divisors, whose sum is σ = 2981497559040. Its totient is φ = 311246143488.

The previous prime is 994409943509. The next prime is 994409943523. The reversal of 994409943520 is 25349904499.

It is a super-2 number, since 2×994409943520² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994409943523) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 957083161 + ... + 957084199.

It is an arithmetic number, because the mean of its divisors is an integer number (5176211040).

Almost surely, 2^994409943520 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 994409943520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1490748779520).

994409943520 is an abundant number, since it is smaller than the sum of its proper divisors (1987087615520).

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

994409943520 is a wasteful number, since it uses less digits than its factorization.

994409943520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 12597120, while the sum is 58.

The spelling of 994409943520 in words is "nine hundred ninety-four billion, four hundred nine million, nine hundred forty-three thousand, five hundred twenty".