16500354149 has 4 divisors (see below), whose sum is σ = 16770851820. Its totient is φ = 16229856480.

The previous prime is 16500354137. The next prime is 16500354163. The reversal of 16500354149 is 94145300561.

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 8569204900 + 7931149249 = 92570^2 + 89057^2 .

It is a cyclic number.

It is not a de Polignac number, because 16500354149 - 2¹⁶ = 16500288613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16500354109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135248744 + ... + 135248865.

It is an arithmetic number, because the mean of its divisors is an integer number (4192712955).

Almost surely, 2^16500354149 is an apocalyptic number.

It is an amenable number.

16500354149 is a deficient number, since it is larger than the sum of its proper divisors (270497671).

16500354149 is an equidigital number, since it uses as much as digits as its factorization.

16500354149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270497670.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16500354149 in words is "sixteen billion, five hundred million, three hundred fifty-four thousand, one hundred forty-nine".