16865474247 has 12 divisors (see below), whose sum is σ = 25420425264. Its totient is φ = 10754795040.

The previous prime is 16865474239. The next prime is 16865474287. The reversal of 16865474247 is 74247456861.

16865474247 is a `hidden beast` number, since 16 + 8 + 6 + 547 + 42 + 47 = 666.

It is not a de Polignac number, because 16865474247 - 2³ = 16865474239 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16865474193 and 16865474202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16865474207) 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, 40737654 + ... + 40738067.

It is an arithmetic number, because the mean of its divisors is an integer number (2118368772).

Almost surely, 2^16865474247 is an apocalyptic number.

16865474247 is a deficient number, since it is larger than the sum of its proper divisors (8554951017).

16865474247 is a wasteful number, since it uses less digits than its factorization.

16865474247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81475750 (or 81475747 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 54.

The spelling of 16865474247 in words is "sixteen billion, eight hundred sixty-five million, four hundred seventy-four thousand, two hundred forty-seven".