16606289121 has 4 divisors (see below), whose sum is σ = 22141718832. Its totient is φ = 11070859412.

The previous prime is 16606289113. The next prime is 16606289171. The reversal of 16606289121 is 12198260661.

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 16606289121 - 2³ = 16606289113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16606289101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767714851 + ... + 2767714856.

It is an arithmetic number, because the mean of its divisors is an integer number (5535429708).

Almost surely, 2^16606289121 is an apocalyptic number.

It is an amenable number.

16606289121 is a deficient number, since it is larger than the sum of its proper divisors (5535429711).

16606289121 is an equidigital number, since it uses as much as digits as its factorization.

16606289121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535429710.

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 16606289121 in words is "sixteen billion, six hundred six million, two hundred eighty-nine thousand, one hundred twenty-one".