16775128645 has 32 divisors (see below), whose sum is σ = 22109220864. Its totient is φ = 12117504000.

The previous prime is 16775128631. The next prime is 16775128651. The reversal of 16775128645 is 54682157761.

16775128645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16775128645 - 2⁹ = 16775128133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16775128592 and 16775128601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12217179 + ... + 12218551.

It is an arithmetic number, because the mean of its divisors is an integer number (690913152).

Almost surely, 2^16775128645 is an apocalyptic number.

It is an amenable number.

16775128645 is a deficient number, since it is larger than the sum of its proper divisors (5334092219).

16775128645 is a wasteful number, since it uses less digits than its factorization.

16775128645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2733.

The product of its digits is 2822400, while the sum is 52.

The spelling of 16775128645 in words is "sixteen billion, seven hundred seventy-five million, one hundred twenty-eight thousand, six hundred forty-five".