16520456645 has 16 divisors (see below), whose sum is σ = 24716320128. Its totient is φ = 10298466240.

The previous prime is 16520456597. The next prime is 16520456671. The reversal of 16520456645 is 54665402561.

16520456645 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 16520456645 - 2¹⁸ = 16520194501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16520456596 and 16520456605.

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 15 ways as a sum of consecutive naturals, for example, 21454754 + ... + 21455523.

It is an arithmetic number, because the mean of its divisors is an integer number (1544770008).

Almost surely, 2^16520456645 is an apocalyptic number.

It is an amenable number.

16520456645 is a deficient number, since it is larger than the sum of its proper divisors (8195863483).

16520456645 is a wasteful number, since it uses less digits than its factorization.

16520456645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42910300.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 16520456645 in words is "sixteen billion, five hundred twenty million, four hundred fifty-six thousand, six hundred forty-five".