994454547840 has 640 divisors, whose sum is σ = 3852833735520. Its totient is φ = 242979471360.

The previous prime is 994454547839. The next prime is 994454547851. The reversal of 994454547840 is 48745454499.

994454547840 is a `hidden beast` number, since 9 + 9 + 4 + 4 + 5 + 4 + 547 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 92321655 + ... + 92332425.

Almost surely, 2^994454547840 is an apocalyptic number.

994454547840 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 994454547840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926416867760).

994454547840 is an abundant number, since it is smaller than the sum of its proper divisors (2858379187680).

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

994454547840 is a wasteful number, since it uses less digits than its factorization.

994454547840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10952 (or 10931 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 63.

The spelling of 994454547840 in words is "nine hundred ninety-four billion, four hundred fifty-four million, five hundred forty-seven thousand, eight hundred forty".