1728881563203 has 32 divisors (see below), whose sum is σ = 2591116677120. Its totient is φ = 1139249797920.

The previous prime is 1728881563187. The next prime is 1728881563231. The reversal of 1728881563203 is 3023651888271.

1728881563203 is a `hidden beast` number, since 1 + 7 + 288 + 8 + 156 + 3 + 203 = 666.

It is not a de Polignac number, because 1728881563203 - 2⁴ = 1728881563187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1728881563203.

It is not an unprimeable number, because it can be changed into a prime (1728881563243) 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 31 ways as a sum of consecutive naturals, for example, 258025 + ... + 1877322.

It is an arithmetic number, because the mean of its divisors is an integer number (80972396160).

Almost surely, 2^{1728881563203} is an apocalyptic number.

1728881563203 is a deficient number, since it is larger than the sum of its proper divisors (862235113917).

1728881563203 is a wasteful number, since it uses less digits than its factorization.

1728881563203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135704 (or 2135698 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 1728881563203 in words is "one trillion, seven hundred twenty-eight billion, eight hundred eighty-one million, five hundred sixty-three thousand, two hundred three".