990204801604 has 24 divisors (see below), whose sum is σ = 1735873341048. Its totient is φ = 494241546240.

The previous prime is 990204801559. The next prime is 990204801613. The reversal of 990204801604 is 406108402099.

It can be written as a sum of positive squares in 4 ways, for example, as 17121199104 + 973083602500 = 130848^2 + 986450^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7216324 + ... + 7352260.

It is an arithmetic number, because the mean of its divisors is an integer number (72328055877).

Almost surely, 2^990204801604 is an apocalyptic number.

It is an amenable number.

990204801604 is a deficient number, since it is larger than the sum of its proper divisors (745668539444).

990204801604 is a wasteful number, since it uses less digits than its factorization.

990204801604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139095 (or 139093 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 990204801604 in words is "nine hundred ninety billion, two hundred four million, eight hundred one thousand, six hundred four".