16123534067321 has 8 divisors (see below), whose sum is σ = 16132469925000. Its totient is φ = 16114599722880.

The previous prime is 16123534067317. The next prime is 16123534067371. The reversal of 16123534067321 is 12376043532161.

It can be written as a sum of positive squares in 4 ways, for example, as 177608302096 + 15945925765225 = 421436^2 + 3993235^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16123534067321 - 2² = 16123534067317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16123534067371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21280205 + ... + 22024853.

It is an arithmetic number, because the mean of its divisors is an integer number (2016558740625).

Almost surely, 2^{16123534067321} is an apocalyptic number.

It is an amenable number.

16123534067321 is a deficient number, since it is larger than the sum of its proper divisors (8935857679).

16123534067321 is an equidigital number, since it uses as much as digits as its factorization.

16123534067321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756619.

The product of its (nonzero) digits is 544320, while the sum is 44.

Adding to 16123534067321 its reverse (12376043532161), we get a palindrome (28499577599482).

The spelling of 16123534067321 in words is "sixteen trillion, one hundred twenty-three billion, five hundred thirty-four million, sixty-seven thousand, three hundred twenty-one".