16685233961 has 4 divisors (see below), whose sum is σ = 18202073424. Its totient is φ = 15168394500.

The previous prime is 16685233951. The next prime is 16685233987. The reversal of 16685233961 is 16933258661.

It is a happy number.

16685233961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16685233961 - 2³⁰ = 15611492137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16685233951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758419715 + ... + 758419736.

It is an arithmetic number, because the mean of its divisors is an integer number (4550518356).

Almost surely, 2^16685233961 is an apocalyptic number.

16685233961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16685233961 is a deficient number, since it is larger than the sum of its proper divisors (1516839463).

16685233961 is a wasteful number, since it uses less digits than its factorization.

16685233961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516839462.

The product of its digits is 1399680, while the sum is 50.

The spelling of 16685233961 in words is "sixteen billion, six hundred eighty-five million, two hundred thirty-three thousand, nine hundred sixty-one".