16891975864 has 24 divisors (see below), whose sum is σ = 32426181360. Its totient is φ = 8249562384.

The previous prime is 16891975861. The next prime is 16891975889. The reversal of 16891975864 is 46857919861.

It is a junction number, because it is equal to n+sod(n) for n = 16891975796 and 16891975805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16891975861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556192 + ... + 585775.

It is an arithmetic number, because the mean of its divisors is an integer number (1351090890).

Almost surely, 2^16891975864 is an apocalyptic number.

It is an amenable number.

16891975864 is a deficient number, since it is larger than the sum of its proper divisors (15534205496).

16891975864 is a wasteful number, since it uses less digits than its factorization.

16891975864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142059 (or 1142012 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 64.

The spelling of 16891975864 in words is "sixteen billion, eight hundred ninety-one million, nine hundred seventy-five thousand, eight hundred sixty-four".