16811271603 has 80 divisors (see below), whose sum is σ = 29201415936. Its totient is φ = 9440141760.

The previous prime is 16811271571. The next prime is 16811271643. The reversal of 16811271603 is 30617211861.

16811271603 is a `hidden beast` number, since 16 + 8 + 11 + 27 + 1 + 603 = 666.

It is not a de Polignac number, because 16811271603 - 2⁵ = 16811271571 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16811271643) 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 79 ways as a sum of consecutive naturals, for example, 9929025 + ... + 9930717.

Almost surely, 2^16811271603 is an apocalyptic number.

16811271603 is a deficient number, since it is larger than the sum of its proper divisors (12390144333).

16811271603 is a wasteful number, since it uses less digits than its factorization.

16811271603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 16811271603 in words is "sixteen billion, eight hundred eleven million, two hundred seventy-one thousand, six hundred three".