994511831040 has 1920 divisors, whose sum is σ = 4477870064640. Its totient is φ = 206391214080.

The previous prime is 994511831009. The next prime is 994511831041. The reversal of 994511831040 is 40138115499.

994511831040 is a `hidden beast` number, since 9 + 9 + 4 + 511 + 83 + 10 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1920).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994511831041) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 16303472610 + ... + 16303472670.

It is an arithmetic number, because the mean of its divisors is an integer number (2332223992).

Almost surely, 2^994511831040 is an apocalyptic number.

994511831040 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 994511831040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2238935032320).

994511831040 is an abundant number, since it is smaller than the sum of its proper divisors (3483358233600).

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

994511831040 is an frugal number, since it uses more digits than its factorization.

994511831040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 994511831040 in words is "nine hundred ninety-four billion, five hundred eleven million, eight hundred thirty-one thousand, forty".