16645845268 has 24 divisors (see below), whose sum is σ = 31505678568. Its totient is φ = 7649719296.

The previous prime is 16645845253. The next prime is 16645845311. The reversal of 16645845268 is 86254854661.

It can be written as a sum of positive squares in 4 ways, for example, as 2726092944 + 13919752324 = 52212^2 + 117982^2 .

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, 674821 + ... + 699052.

It is an arithmetic number, because the mean of its divisors is an integer number (1312736607).

Almost surely, 2^16645845268 is an apocalyptic number.

It is an amenable number.

16645845268 is a deficient number, since it is larger than the sum of its proper divisors (14859833300).

16645845268 is a wasteful number, since it uses less digits than its factorization.

16645845268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374123 (or 1374121 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 55.

The spelling of 16645845268 in words is "sixteen billion, six hundred forty-five million, eight hundred forty-five thousand, two hundred sixty-eight".