16556791189 has 8 divisors (see below), whose sum is σ = 16710743808. Its totient is φ = 16403256480.

The previous prime is 16556791183. The next prime is 16556791213. The reversal of 16556791189 is 98119765561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16556791189 - 2¹⁷ = 16556660117 is a prime.

It is a super-2 number, since 2×16556791189² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556791183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24592 + ... + 183625.

It is an arithmetic number, because the mean of its divisors is an integer number (2088842976).

Almost surely, 2^16556791189 is an apocalyptic number.

It is an amenable number.

16556791189 is a deficient number, since it is larger than the sum of its proper divisors (153952619).

16556791189 is a wasteful number, since it uses less digits than its factorization.

16556791189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208955.

The product of its digits is 4082400, while the sum is 58.

The spelling of 16556791189 in words is "sixteen billion, five hundred fifty-six million, seven hundred ninety-one thousand, one hundred eighty-nine".