16327217285 has 4 divisors (see below), whose sum is σ = 19592660748. Its totient is φ = 13061773824.

The previous prime is 16327217281. The next prime is 16327217287. The reversal of 16327217285 is 58271272361.

It is a Cunningham number, because it is equal to 127778²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5877675556 + 10449541729 = 76666^2 + 102223^2 .

It is a cyclic number.

It is not a de Polignac number, because 16327217285 - 2² = 16327217281 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 (16327217281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1632721724 + ... + 1632721733.

It is an arithmetic number, because the mean of its divisors is an integer number (4898165187).

Almost surely, 2^16327217285 is an apocalyptic number.

It is an amenable number.

16327217285 is a deficient number, since it is larger than the sum of its proper divisors (3265443463).

16327217285 is an equidigital number, since it uses as much as digits as its factorization.

16327217285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265443462.

The product of its digits is 282240, while the sum is 44.

The spelling of 16327217285 in words is "sixteen billion, three hundred twenty-seven million, two hundred seventeen thousand, two hundred eighty-five".