16561627 has 2 divisors, whose sum is σ = 16561628. Its totient is φ = 16561626.

The previous prime is 16561613. The next prime is 16561661. The reversal of 16561627 is 72616561.

It is a happy number.

It is an a-pointer prime, because the next prime (16561661) can be obtained adding 16561627 to its sum of digits (34).

It is a weak prime.

It is an emirp because it is prime and its reverse (72616561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16561627 - 2²³ = 8173019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16561592 and 16561601.

It is not a weakly prime, because it can be changed into another prime (16561667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280813 + 8280814.

It is an arithmetic number, because the mean of its divisors is an integer number (8280814).

Almost surely, 2^16561627 is an apocalyptic number.

16561627 is a deficient number, since it is larger than the sum of its proper divisors (1).

16561627 is an equidigital number, since it uses as much as digits as its factorization.

16561627 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 16561627 is about 4069.5978916841. The cubic root of 16561627 is about 254.8987269256.

The spelling of 16561627 in words is "sixteen million, five hundred sixty-one thousand, six hundred twenty-seven".