16679505889 has 4 divisors (see below), whose sum is σ = 17557374640. Its totient is φ = 15801637140.

The previous prime is 16679505881. The next prime is 16679505937. The reversal of 16679505889 is 98850597661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16679505889 - 2³ = 16679505881 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16679505889.

It is not an unprimeable number, because it can be changed into a prime (16679505881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438934347 + ... + 438934384.

It is an arithmetic number, because the mean of its divisors is an integer number (4389343660).

Almost surely, 2^16679505889 is an apocalyptic number.

16679505889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16679505889 is a deficient number, since it is larger than the sum of its proper divisors (877868751).

16679505889 is an equidigital number, since it uses as much as digits as its factorization.

16679505889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877868750.

The product of its (nonzero) digits is 32659200, while the sum is 64.

The spelling of 16679505889 in words is "sixteen billion, six hundred seventy-nine million, five hundred five thousand, eight hundred eighty-nine".