16672224729565 has 8 divisors (see below), whose sum is σ = 20008825390008. Its totient is φ = 13336342640640.

The previous prime is 16672224729553. The next prime is 16672224729581. The reversal of 16672224729565 is 56592742227661.

It can be written as a sum of positive squares in 4 ways, for example, as 2874469321476 + 13797755408089 = 1695426^2 + 3714533^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16672224729565 - 2⁷ = 16672224729437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16672224729497 and 16672224729506.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 179591832 + ... + 179684641.

It is an arithmetic number, because the mean of its divisors is an integer number (2501103173751).

Almost surely, 2^{16672224729565} is an apocalyptic number.

It is an amenable number.

16672224729565 is a deficient number, since it is larger than the sum of its proper divisors (3336600660443).

16672224729565 is an equidigital number, since it uses as much as digits as its factorization.

16672224729565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359285759.

The product of its digits is 152409600, while the sum is 64.

The spelling of 16672224729565 in words is "sixteen trillion, six hundred seventy-two billion, two hundred twenty-four million, seven hundred twenty-nine thousand, five hundred sixty-five".