203196561872 has 20 divisors (see below), whose sum is σ = 414414041280. Its totient is φ = 96251002848.

The previous prime is 203196561811. The next prime is 203196561889. The reversal of 203196561872 is 278165691302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 203196561872.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 334204568 + ... + 334205175.

It is an arithmetic number, because the mean of its divisors is an integer number (20720702064).

Almost surely, 2^203196561872 is an apocalyptic number.

It is an amenable number.

203196561872 is an abundant number, since it is smaller than the sum of its proper divisors (211217479408).

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

203196561872 is a wasteful number, since it uses less digits than its factorization.

203196561872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668409770 (or 668409764 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The spelling of 203196561872 in words is "two hundred three billion, one hundred ninety-six million, five hundred sixty-one thousand, eight hundred seventy-two".