16585420279 has 2 divisors, whose sum is σ = 16585420280. Its totient is φ = 16585420278.

The previous prime is 16585420277. The next prime is 16585420297. The reversal of 16585420279 is 97202458561.

Together with next prime (16585420297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16585420279 - 2¹ = 16585420277 is a prime.

Together with 16585420277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16585420277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8292710139 + 8292710140.

It is an arithmetic number, because the mean of its divisors is an integer number (8292710140).

Almost surely, 2^16585420279 is an apocalyptic number.

16585420279 is a deficient number, since it is larger than the sum of its proper divisors (1).

16585420279 is an equidigital number, since it uses as much as digits as its factorization.

16585420279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The spelling of 16585420279 in words is "sixteen billion, five hundred eighty-five million, four hundred twenty thousand, two hundred seventy-nine".