16447608505 has 8 divisors (see below), whose sum is σ = 19758801024. Its totient is φ = 13143639600.

The previous prime is 16447608497. The next prime is 16447608521. The reversal of 16447608505 is 50580674461.

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

It is not a de Polignac number, because 16447608505 - 2³ = 16447608497 is a prime.

It is a Duffinian number.

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, 1800891 + ... + 1810000.

It is an arithmetic number, because the mean of its divisors is an integer number (2469850128).

Almost surely, 2^16447608505 is an apocalyptic number.

It is an amenable number.

16447608505 is a deficient number, since it is larger than the sum of its proper divisors (3311192519).

16447608505 is an equidigital number, since it uses as much as digits as its factorization.

16447608505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3611807.

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 16447608505 in words is "sixteen billion, four hundred forty-seven million, six hundred eight thousand, five hundred five".