16273453520405 has 8 divisors (see below), whose sum is σ = 19528171350072. Its totient is φ = 13018744732608.

The previous prime is 16273453520351. The next prime is 16273453520521. The reversal of 16273453520405 is 50402535437261.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4672229233156 + 11601224287249 = 2161534^2 + 3406057^2 .

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 16273453520405 - 2¹⁸ = 16273453258261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16273453520405.

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, 2681159 + ... + 6303611.

It is an arithmetic number, because the mean of its divisors is an integer number (2441021418759).

Almost surely, 2^{16273453520405} is an apocalyptic number.

It is an amenable number.

16273453520405 is a deficient number, since it is larger than the sum of its proper divisors (3254717829667).

16273453520405 is an equidigital number, since it uses as much as digits as its factorization.

16273453520405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520935.

The product of its (nonzero) digits is 3024000, while the sum is 47.

Adding to 16273453520405 its reverse (50402535437261), we get a palindrome (66675988957666).

The spelling of 16273453520405 in words is "sixteen trillion, two hundred seventy-three billion, four hundred fifty-three million, five hundred twenty thousand, four hundred five".