990127385712 has 160 divisors (see below), whose sum is σ = 2915648386560. Its totient is φ = 321517278720.

The previous prime is 990127385701. The next prime is 990127385719. The reversal of 990127385712 is 217583721099.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990127385719) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 12056373 + ... + 12138219.

It is an arithmetic number, because the mean of its divisors is an integer number (18222802416).

Almost surely, 2^990127385712 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 990127385712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457824193280).

990127385712 is an abundant number, since it is smaller than the sum of its proper divisors (1925521000848).

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

990127385712 is a wasteful number, since it uses less digits than its factorization.

990127385712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82588 (or 82576 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 990127385712 in words is "nine hundred ninety billion, one hundred twenty-seven million, three hundred eighty-five thousand, seven hundred twelve".