16506436449 has 4 divisors (see below), whose sum is σ = 22008581936. Its totient is φ = 11004290964.

The previous prime is 16506436417. The next prime is 16506436493. The reversal of 16506436449 is 94463460561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16506436449 - 2⁵ = 16506436417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16506436398 and 16506436407.

It is not an unprimeable number, because it can be changed into a prime (16506438449) 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, 2751072739 + ... + 2751072744.

It is an arithmetic number, because the mean of its divisors is an integer number (5502145484).

Almost surely, 2^16506436449 is an apocalyptic number.

It is an amenable number.

16506436449 is a deficient number, since it is larger than the sum of its proper divisors (5502145487).

16506436449 is an equidigital number, since it uses as much as digits as its factorization.

16506436449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5502145486.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 16506436449 in words is "sixteen billion, five hundred six million, four hundred thirty-six thousand, four hundred forty-nine".