16516520847 has 12 divisors (see below), whose sum is σ = 23858327584. Its totient is φ = 11010492000.

The previous prime is 16516520837. The next prime is 16516520863. The reversal of 16516520847 is 74802561561.

16516520847 is a `hidden beast` number, since 1 + 6 + 516 + 52 + 0 + 84 + 7 = 666.

It is not a de Polignac number, because 16516520847 - 2⁴ = 16516520831 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 (16516520827) 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, 298347 + ... + 349347.

Almost surely, 2^16516520847 is an apocalyptic number.

16516520847 is a deficient number, since it is larger than the sum of its proper divisors (7341806737).

16516520847 is a wasteful number, since it uses less digits than its factorization.

16516520847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86990 (or 86987 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 16516520847 in words is "sixteen billion, five hundred sixteen million, five hundred twenty thousand, eight hundred forty-seven".