16657535277121 has 4 divisors (see below), whose sum is σ = 16663478032432. Its totient is φ = 16651592521812.

The previous prime is 16657535277091. The next prime is 16657535277137. The reversal of 16657535277121 is 12177253575661.

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 16657535277121 - 2⁹ = 16657535276609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16657535271121) 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 3 ways as a sum of consecutive naturals, for example, 2971373451 + ... + 2971379056.

It is an arithmetic number, because the mean of its divisors is an integer number (4165869508108).

Almost surely, 2^{16657535277121} is an apocalyptic number.

It is an amenable number.

16657535277121 is a deficient number, since it is larger than the sum of its proper divisors (5942755311).

16657535277121 is an equidigital number, since it uses as much as digits as its factorization.

16657535277121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942755310.

The product of its digits is 18522000, while the sum is 58.

The spelling of 16657535277121 in words is "sixteen trillion, six hundred fifty-seven billion, five hundred thirty-five million, two hundred seventy-seven thousand, one hundred twenty-one".