16851850847 has 4 divisors (see below), whose sum is σ = 18148147080. Its totient is φ = 15555554616.

The previous prime is 16851850711. The next prime is 16851850849. The reversal of 16851850847 is 74805815861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16851850847 - 2⁸ = 16851850591 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 (16851850849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648148097 + ... + 648148122.

It is an arithmetic number, because the mean of its divisors is an integer number (4537036770).

Almost surely, 2^16851850847 is an apocalyptic number.

16851850847 is a deficient number, since it is larger than the sum of its proper divisors (1296296233).

16851850847 is a wasteful number, since it uses less digits than its factorization.

16851850847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296296232.

The product of its (nonzero) digits is 2150400, while the sum is 53.

The spelling of 16851850847 in words is "sixteen billion, eight hundred fifty-one million, eight hundred fifty thousand, eight hundred forty-seven".