16858552427 has 4 divisors (see below), whose sum is σ = 17745844680. Its totient is φ = 15971260176.

The previous prime is 16858552423. The next prime is 16858552429. The reversal of 16858552427 is 72425585861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72425585861 = 359 ⋅201742579.

It is a cyclic number.

It is not a de Polignac number, because 16858552427 - 2² = 16858552423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16858552423) 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, 443646098 + ... + 443646135.

It is an arithmetic number, because the mean of its divisors is an integer number (4436461170).

Almost surely, 2^16858552427 is an apocalyptic number.

16858552427 is a deficient number, since it is larger than the sum of its proper divisors (887292253).

16858552427 is an equidigital number, since it uses as much as digits as its factorization.

16858552427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887292252.

The product of its digits is 5376000, while the sum is 53.

The spelling of 16858552427 in words is "sixteen billion, eight hundred fifty-eight million, five hundred fifty-two thousand, four hundred twenty-seven".