994356533520 has 640 divisors, whose sum is σ = 4011469440000. Its totient is φ = 226297774080.

The previous prime is 994356533501. The next prime is 994356533563. The reversal of 994356533520 is 25335653499.

It is a happy number.

994356533520 is a `hidden beast` number, since 9 + 9 + 4 + 3 + 56 + 533 + 52 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 178549296 + ... + 178554864.

It is an arithmetic number, because the mean of its divisors is an integer number (6267921000).

Almost surely, 2^994356533520 is an apocalyptic number.

994356533520 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 994356533520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005734720000).

994356533520 is an abundant number, since it is smaller than the sum of its proper divisors (3017112906480).

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

994356533520 is a wasteful number, since it uses less digits than its factorization.

994356533520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853 (or 5827 counting only the distinct ones).

The product of its (nonzero) digits is 13122000, while the sum is 54.

The spelling of 994356533520 in words is "nine hundred ninety-four billion, three hundred fifty-six million, five hundred thirty-three thousand, five hundred twenty".