994427784099 has 96 divisors (see below), whose sum is σ = 1524245299200. Its totient is φ = 623511472320.

The previous prime is 994427784071. The next prime is 994427784109. The reversal of 994427784099 is 990487724499.

994427784099 is a `hidden beast` number, since 9 + 9 + 4 + 427 + 78 + 40 + 99 = 666.

994427784099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 997210²-1.

It is not a de Polignac number, because 994427784099 - 2²⁸ = 994159348643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (994427784029) 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, 1606506612 + ... + 1606507230.

It is an arithmetic number, because the mean of its divisors is an integer number (15877555200).

Almost surely, 2^994427784099 is an apocalyptic number.

994427784099 is a deficient number, since it is larger than the sum of its proper divisors (529817515101).

994427784099 is a wasteful number, since it uses less digits than its factorization.

994427784099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 72.

The spelling of 994427784099 in words is "nine hundred ninety-four billion, four hundred twenty-seven million, seven hundred eighty-four thousand, ninety-nine".