16506444445 has 4 divisors (see below), whose sum is σ = 19807733340. Its totient is φ = 13205155552.

The previous prime is 16506444433. The next prime is 16506444463. The reversal of 16506444445 is 54444460561.

It is a happy number.

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 4561921764 + 11944522681 = 67542^2 + 109291^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506444445 - 2⁵ = 16506444413 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1650644440 + ... + 1650644449.

It is an arithmetic number, because the mean of its divisors is an integer number (4951933335).

Almost surely, 2^16506444445 is an apocalyptic number.

It is an amenable number.

16506444445 is a deficient number, since it is larger than the sum of its proper divisors (3301288895).

16506444445 is an equidigital number, since it uses as much as digits as its factorization.

16506444445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301288894.

The product of its (nonzero) digits is 921600, while the sum is 43.

The spelling of 16506444445 in words is "sixteen billion, five hundred six million, four hundred forty-four thousand, four hundred forty-five".