16557110645 has 8 divisors (see below), whose sum is σ = 21037270104. Its totient is φ = 12466530304.

The previous prime is 16557110617. The next prime is 16557110651. The reversal of 16557110645 is 54601175561.

It can be written as a sum of positive squares in 4 ways, for example, as 839724484 + 15717386161 = 28978^2 + 125369^2 .

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

It is not a de Polignac number, because 16557110645 - 2¹² = 16557106549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97394684 + ... + 97394853.

It is an arithmetic number, because the mean of its divisors is an integer number (2629658763).

Almost surely, 2^16557110645 is an apocalyptic number.

It is an amenable number.

16557110645 is a deficient number, since it is larger than the sum of its proper divisors (4480159459).

16557110645 is a wasteful number, since it uses less digits than its factorization.

16557110645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194789559.

The product of its (nonzero) digits is 126000, while the sum is 41.

The spelling of 16557110645 in words is "sixteen billion, five hundred fifty-seven million, one hundred ten thousand, six hundred forty-five".