16645534351 has 4 divisors (see below), whose sum is σ = 17182487104. Its totient is φ = 16108581600.

The previous prime is 16645534333. The next prime is 16645534357. The reversal of 16645534351 is 15343554661.

16645534351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16645534351 - 2⁵ = 16645534319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16645534298 and 16645534307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645534357) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 268476330 + ... + 268476391.

It is an arithmetic number, because the mean of its divisors is an integer number (4295621776).

Almost surely, 2^16645534351 is an apocalyptic number.

16645534351 is a deficient number, since it is larger than the sum of its proper divisors (536952753).

16645534351 is an equidigital number, since it uses as much as digits as its factorization.

16645534351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536952752.

The product of its digits is 648000, while the sum is 43.

The spelling of 16645534351 in words is "sixteen billion, six hundred forty-five million, five hundred thirty-four thousand, three hundred fifty-one".