16851415861 has 8 divisors (see below), whose sum is σ = 19668522240. Its totient is φ = 14136749808.

The previous prime is 16851415853. The next prime is 16851415871.

16851415861 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16851415861 - 2³ = 16851415853 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 (16851415831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25609726 + ... + 25610383.

It is an arithmetic number, because the mean of its divisors is an integer number (2458565280).

Almost surely, 2^16851415861 is an apocalyptic number.

It is an amenable number.

16851415861 is a deficient number, since it is larger than the sum of its proper divisors (2817106379).

16851415861 is an equidigital number, since it uses as much as digits as its factorization.

16851415861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51220163.

The product of its digits is 230400, while the sum is 46.

The spelling of 16851415861 in words is "sixteen billion, eight hundred fifty-one million, four hundred fifteen thousand, eight hundred sixty-one".