203448661338 has 64 divisors (see below), whose sum is σ = 464410679040. Its totient is φ = 58861734912.

The previous prime is 203448661289. The next prime is 203448661357. The reversal of 203448661338 is 833166844302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1345731 + ... + 1489257.

It is an arithmetic number, because the mean of its divisors is an integer number (7256416860).

Almost surely, 2^203448661338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203448661338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232205339520).

203448661338 is an abundant number, since it is smaller than the sum of its proper divisors (260962017702).

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

203448661338 is a wasteful number, since it uses less digits than its factorization.

203448661338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144631.

The product of its (nonzero) digits is 1990656, while the sum is 48.

The spelling of 203448661338 in words is "two hundred three billion, four hundred forty-eight million, six hundred sixty-one thousand, three hundred thirty-eight".