16516552809 has 8 divisors (see below), whose sum is σ = 22025415040. Its totient is φ = 11009362896.

The previous prime is 16516552783. The next prime is 16516552841. The reversal of 16516552809 is 90825561561.

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

It is not a de Polignac number, because 16516552809 - 2⁸ = 16516552553 is a prime.

It is a super-3 number, since 3×16516552809³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16516552889) 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, 394849 + ... + 434670.

It is an arithmetic number, because the mean of its divisors is an integer number (2753176880).

Almost surely, 2^16516552809 is an apocalyptic number.

It is an amenable number.

16516552809 is a deficient number, since it is larger than the sum of its proper divisors (5508862231).

16516552809 is an equidigital number, since it uses as much as digits as its factorization.

16516552809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836159.

The product of its (nonzero) digits is 648000, while the sum is 48.

The spelling of 16516552809 in words is "sixteen billion, five hundred sixteen million, five hundred fifty-two thousand, eight hundred nine".