990675836928 has 168 divisors, whose sum is σ = 2967775469568. Its totient is φ = 330224615424.

The previous prime is 990675836881. The next prime is 990675836933. The reversal of 990675836928 is 829638576099.

It is a Cunningham number, because it is equal to 995327²-1.

It is a super-2 number, since 2×990675836928² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1741825 + ... + 2239487.

It is an arithmetic number, because the mean of its divisors is an integer number (17665330176).

Almost surely, 2^990675836928 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 990675836928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1483887734784).

990675836928 is an abundant number, since it is smaller than the sum of its proper divisors (1977099632640).

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

990675836928 is an frugal number, since it uses more digits than its factorization.

990675836928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497704 (or 497668 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 72.

The spelling of 990675836928 in words is "nine hundred ninety billion, six hundred seventy-five million, eight hundred thirty-six thousand, nine hundred twenty-eight".