994385392560 has 720 divisors, whose sum is σ = 4011378317856. Its totient is φ = 219943600128.

The previous prime is 994385392519. The next prime is 994385392571. The reversal of 994385392560 is 65293583499.

994385392560 is a `hidden beast` number, since 9 + 9 + 4 + 38 + 5 + 39 + 2 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 251932507 + ... + 251936453.

Almost surely, 2^994385392560 is an apocalyptic number.

994385392560 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 994385392560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2005689158928).

994385392560 is an abundant number, since it is smaller than the sum of its proper divisors (3016992925296).

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

994385392560 is a wasteful number, since it uses less digits than its factorization.

994385392560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4210 (or 4194 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 63.

It can be divided in two parts, 994385 and 392560, that added together give a triangular number (1386945 = T₁₆₆₅).

The spelling of 994385392560 in words is "nine hundred ninety-four billion, three hundred eighty-five million, three hundred ninety-two thousand, five hundred sixty".