16500506515117 has 12 divisors (see below), whose sum is σ = 17538018048340. Its totient is φ = 15521207233536.

The previous prime is 16500506515111. The next prime is 16500506515121. The reversal of 16500506515117 is 71151560500561.

16500506515117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 5061865519881 + 11438640995236 = 2249859^2 + 3382106^2 .

It is not a de Polignac number, because 16500506515117 - 2³⁵ = 16466146776749 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 (16500506515111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15440268 + ... + 16474309.

Almost surely, 2^{16500506515117} is an apocalyptic number.

16500506515117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16500506515117 is a deficient number, since it is larger than the sum of its proper divisors (1037511533223).

16500506515117 is a wasteful number, since it uses less digits than its factorization.

16500506515117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31916400 (or 31916383 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 43.

The spelling of 16500506515117 in words is "sixteen trillion, five hundred billion, five hundred six million, five hundred fifteen thousand, one hundred seventeen".