16506353453 has 4 divisors (see below), whose sum is σ = 16512274620. Its totient is φ = 16500432288.

The previous prime is 16506353447. The next prime is 16506353471. The reversal of 16506353453 is 35435360561.

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 10388297929 + 6118055524 = 101923^2 + 78218^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506353453 - 2⁶ = 16506353389 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 16506353453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506353153) 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, 2956400 + ... + 2961977.

It is an arithmetic number, because the mean of its divisors is an integer number (4128068655).

Almost surely, 2^16506353453 is an apocalyptic number.

It is an amenable number.

16506353453 is a deficient number, since it is larger than the sum of its proper divisors (5921167).

16506353453 is an equidigital number, since it uses as much as digits as its factorization.

16506353453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5921166.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 16506353453 in words is "sixteen billion, five hundred six million, three hundred fifty-three thousand, four hundred fifty-three".