16646197271 has 8 divisors (see below), whose sum is σ = 18162658704. Its totient is φ = 15130264320.

The previous prime is 16646197201. The next prime is 16646197277. The reversal of 16646197271 is 17279164661.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16646197271 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 (16646197277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64760 + ... + 193613.

It is an arithmetic number, because the mean of its divisors is an integer number (2270332338).

Almost surely, 2^16646197271 is an apocalyptic number.

16646197271 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16646197271 is a deficient number, since it is larger than the sum of its proper divisors (1516461433).

16646197271 is a wasteful number, since it uses less digits than its factorization.

16646197271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264241.

The product of its digits is 762048, while the sum is 50.

The spelling of 16646197271 in words is "sixteen billion, six hundred forty-six million, one hundred ninety-seven thousand, two hundred seventy-one".