990717382764 has 144 divisors (see below), whose sum is σ = 2587451682816. Its totient is φ = 319425811200.

The previous prime is 990717382763. The next prime is 990717382829. The reversal of 990717382764 is 467283717099.

It is not an unprimeable number, because it can be changed into a prime (990717382763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86542489 + ... + 86553935.

It is an arithmetic number, because the mean of its divisors is an integer number (17968414464).

Almost surely, 2^990717382764 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 990717382764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293725841408).

990717382764 is an abundant number, since it is smaller than the sum of its proper divisors (1596734300052).

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

990717382764 is a wasteful number, since it uses less digits than its factorization.

990717382764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11996 (or 11991 counting only the distinct ones).

The product of its (nonzero) digits is 32006016, while the sum is 63.

The spelling of 990717382764 in words is "nine hundred ninety billion, seven hundred seventeen million, three hundred eighty-two thousand, seven hundred sixty-four".