16500551201 has 4 divisors (see below), whose sum is σ = 16646573892. Its totient is φ = 16354528512.

The previous prime is 16500551189. The next prime is 16500551227. The reversal of 16500551201 is 10215500561.

16500551201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10215500561 = 7 ⋅1459357223.

It can be written as a sum of positive squares in 2 ways, for example, as 1811353600 + 14689197601 = 42560^2 + 121199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16500551201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16500551251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73011176 + ... + 73011401.

It is an arithmetic number, because the mean of its divisors is an integer number (4161643473).

Almost surely, 2^16500551201 is an apocalyptic number.

It is an amenable number.

16500551201 is a deficient number, since it is larger than the sum of its proper divisors (146022691).

16500551201 is a wasteful number, since it uses less digits than its factorization.

16500551201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146022690.

The product of its (nonzero) digits is 1500, while the sum is 26.

The spelling of 16500551201 in words is "sixteen billion, five hundred million, five hundred fifty-one thousand, two hundred one".