990579979776 has 120 divisors (see below), whose sum is σ = 2726845071192. Its totient is φ = 319541452800.

The previous prime is 990579979729. The next prime is 990579979777. The reversal of 990579979776 is 677979975099.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990579979777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1140556 + ... + 1811636.

Almost surely, 2^990579979776 is an apocalyptic number.

990579979776 is a gapful number since it is divisible by the number (96) 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 990579979776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363422535596).

990579979776 is an abundant number, since it is smaller than the sum of its proper divisors (1736265091416).

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

990579979776 is an equidigital number, since it uses as much as digits as its factorization.

990579979776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671164 (or 671117 counting only the distinct ones).

The product of its (nonzero) digits is 4253299470, while the sum is 84.

The spelling of 990579979776 in words is "nine hundred ninety billion, five hundred seventy-nine million, nine hundred seventy-nine thousand, seven hundred seventy-six".