16516217853 has 6 divisors (see below), whose sum is σ = 23856759134. Its totient is φ = 11010811896.

The previous prime is 16516217849. The next prime is 16516217857. The reversal of 16516217853 is 35871261561.

16516217853 is a `hidden beast` number, since 16 + 5 + 1 + 621 + 7 + 8 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (16516217849) and next prime (16516217857).

It can be written as a sum of positive squares in only one way, i.e., 12609717849 + 3906500004 = 112293^2 + 62502^2 .

It is not a de Polignac number, because 16516217853 - 2² = 16516217849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16516217799 and 16516217808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16516217857) 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 5 ways as a sum of consecutive naturals, for example, 917567650 + ... + 917567667.

Almost surely, 2^16516217853 is an apocalyptic number.

It is an amenable number.

16516217853 is a deficient number, since it is larger than the sum of its proper divisors (7340541281).

16516217853 is a wasteful number, since it uses less digits than its factorization.

16516217853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835135323 (or 1835135320 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 16516217853 in words is "sixteen billion, five hundred sixteen million, two hundred seventeen thousand, eight hundred fifty-three".