16851018425913 has 24 divisors (see below), whose sum is σ = 29281636030400. Its totient is φ = 9122355838944.

The previous prime is 16851018425909. The next prime is 16851018425981. The reversal of 16851018425913 is 31952481015861.

16851018425913 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 1 + 0 + 1 + 8 + 42 + 591 + 3 = 666.

It is not a de Polignac number, because 16851018425913 - 2² = 16851018425909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16851018425913.

It is not an unprimeable number, because it can be changed into a prime (16851018424913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7038853618 + ... + 7038856011.

Almost surely, 2^{16851018425913} is an apocalyptic number.

It is an amenable number.

16851018425913 is a deficient number, since it is larger than the sum of its proper divisors (12430617604487).

16851018425913 is a wasteful number, since it uses less digits than its factorization.

16851018425913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14077709661 (or 14077709658 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 16851018425913 in words is "sixteen trillion, eight hundred fifty-one billion, eighteen million, four hundred twenty-five thousand, nine hundred thirteen".