990204801603 has 8 divisors (see below), whose sum is σ = 1327185494016. Its totient is φ = 656680321800.

The previous prime is 990204801559. The next prime is 990204801613. The reversal of 990204801603 is 306108402099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 990204801603 - 2²¹ = 990202704451 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (990204801613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 864052483 + ... + 864053628.

It is an arithmetic number, because the mean of its divisors is an integer number (165898186752).

Almost surely, 2^990204801603 is an apocalyptic number.

990204801603 is a deficient number, since it is larger than the sum of its proper divisors (336980692413).

990204801603 is a wasteful number, since it uses less digits than its factorization.

990204801603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728106305.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 990204801603 in words is "nine hundred ninety billion, two hundred four million, eight hundred one thousand, six hundred three".