16623453832969 has 9 divisors (see below), whose sum is σ = 17377735023943. Its totient is φ = 15900605272552.

The previous prime is 16623453832903. The next prime is 16623453833011. The reversal of 16623453832969 is 96923835432661.

The square root of 16623453832969 is 4077187.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3805765000569 + 12817688832400 = 1950837^2 + 3580180^2 .

It is not a de Polignac number, because 16623453832969 - 2⁹ = 16623453832457 is a prime.

It is a super-2 number, since 2×16623453832969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16623453835969) 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 8 ways as a sum of consecutive naturals, for example, 93686667 + ... + 93863935.

Almost surely, 2^{16623453832969} is an apocalyptic number.

16623453832969 is the 4077187-th square number.

16623453832969 is the 2038594-th centered octagonal number.

It is an amenable number.

16623453832969 is a deficient number, since it is larger than the sum of its proper divisors (754281190974).

16623453832969 is an frugal number, since it uses more digits than its factorization.

16623453832969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354584 (or 177292 counting only the distinct ones).

The product of its digits is 302330880, while the sum is 67.

The spelling of 16623453832969 in words is "sixteen trillion, six hundred twenty-three billion, four hundred fifty-three million, eight hundred thirty-two thousand, nine hundred sixty-nine".