16343523115505 has 4 divisors (see below), whose sum is σ = 19612227738612. Its totient is φ = 13074818492400.

The previous prime is 16343523115501. The next prime is 16343523115547. The reversal of 16343523115505 is 50551132534361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5096112106849 + 11247411008656 = 2257457^2 + 3353716^2 .

It is not a de Polignac number, because 16343523115505 - 2² = 16343523115501 is a prime.

It is a super-2 number, since 2×16343523115505² (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 (16343523115501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1634352311546 + ... + 1634352311555.

It is an arithmetic number, because the mean of its divisors is an integer number (4903056934653).

Almost surely, 2^{16343523115505} is an apocalyptic number.

It is an amenable number.

16343523115505 is a deficient number, since it is larger than the sum of its proper divisors (3268704623107).

16343523115505 is an equidigital number, since it uses as much as digits as its factorization.

16343523115505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3268704623106.

The product of its (nonzero) digits is 810000, while the sum is 44.

Adding to 16343523115505 its reverse (50551132534361), we get a palindrome (66894655649866).

The spelling of 16343523115505 in words is "sixteen trillion, three hundred forty-three billion, five hundred twenty-three million, one hundred fifteen thousand, five hundred five".