16513678163 has 4 divisors (see below), whose sum is σ = 16513935648. Its totient is φ = 16513420680.

The previous prime is 16513678147. The next prime is 16513678201. The reversal of 16513678163 is 36187631561.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16513678163 - 2⁴ = 16513678147 is a prime.

It is a super-2 number, since 2×16513678163² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16513678123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52673 + ... + 189213.

It is an arithmetic number, because the mean of its divisors is an integer number (4128483912).

Almost surely, 2^16513678163 is an apocalyptic number.

16513678163 is a deficient number, since it is larger than the sum of its proper divisors (257485).

16513678163 is a wasteful number, since it uses less digits than its factorization.

16513678163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257484.

The product of its digits is 544320, while the sum is 47.

The spelling of 16513678163 in words is "sixteen billion, five hundred thirteen million, six hundred seventy-eight thousand, one hundred sixty-three".