16809563428 has 24 divisors (see below), whose sum is σ = 33825388352. Its totient is φ = 7159899744.

The previous prime is 16809563413. The next prime is 16809563443. The reversal of 16809563428 is 82436590861.

It is an interprime number because it is at equal distance from previous prime (16809563413) and next prime (16809563443).

It is a super-2 number, since 2×16809563428² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1836975 + ... + 1846102.

Almost surely, 2^16809563428 is an apocalyptic number.

It is an amenable number.

16809563428 is an abundant number, since it is smaller than the sum of its proper divisors (17015824924).

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

16809563428 is a wasteful number, since it uses less digits than its factorization.

16809563428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683251 (or 3683249 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 16809563428 in words is "sixteen billion, eight hundred nine million, five hundred sixty-three thousand, four hundred twenty-eight".