16506545351 has 4 divisors (see below), whose sum is σ = 17075736600. Its totient is φ = 15937354104.

The previous prime is 16506545311. The next prime is 16506545359. The reversal of 16506545351 is 15354560561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16506545351 - 2¹⁴ = 16506528967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16506545299 and 16506545308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506545359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284595581 + ... + 284595638.

It is an arithmetic number, because the mean of its divisors is an integer number (4268934150).

Almost surely, 2^16506545351 is an apocalyptic number.

16506545351 is a deficient number, since it is larger than the sum of its proper divisors (569191249).

16506545351 is an equidigital number, since it uses as much as digits as its factorization.

16506545351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569191248.

The product of its (nonzero) digits is 270000, while the sum is 41.

The spelling of 16506545351 in words is "sixteen billion, five hundred six million, five hundred forty-five thousand, three hundred fifty-one".