990499974912 has 1008 divisors, whose sum is σ = 3513064988160. Its totient is φ = 272769638400.

The previous prime is 990499974901. The next prime is 990499974917. The reversal of 990499974912 is 219479994099.

990499974912 is a `hidden beast` number, since 9 + 9 + 0 + 49 + 9 + 97 + 491 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990499974917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 5472375462 + ... + 5472375642.

It is an arithmetic number, because the mean of its divisors is an integer number (3485183520).

Almost surely, 2^990499974912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 990499974912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1756532494080).

990499974912 is an abundant number, since it is smaller than the sum of its proper divisors (2522565013248).

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

990499974912 is an equidigital number, since it uses as much as digits as its factorization.

990499974912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 119042784, while the sum is 72.

The spelling of 990499974912 in words is "nine hundred ninety billion, four hundred ninety-nine million, nine hundred seventy-four thousand, nine hundred twelve".