16555434127 has 2 divisors, whose sum is σ = 16555434128. Its totient is φ = 16555434126.

The previous prime is 16555434121. The next prime is 16555434149. The reversal of 16555434127 is 72143455561.

It is a weak prime.

It is an emirp because it is prime and its reverse (72143455561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16555434127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16555434121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277717063 + 8277717064.

It is an arithmetic number, because the mean of its divisors is an integer number (8277717064).

Almost surely, 2^16555434127 is an apocalyptic number.

16555434127 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555434127 is an equidigital number, since it uses as much as digits as its factorization.

16555434127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 43.

Adding to 16555434127 its reverse (72143455561), we get a palindrome (88698889688).

It can be divided in two parts, 16555434 and 127, that added together give a palindrome (16555561).

The spelling of 16555434127 in words is "sixteen billion, five hundred fifty-five million, four hundred thirty-four thousand, one hundred twenty-seven".