16127442997 has 2 divisors, whose sum is σ = 16127442998. Its totient is φ = 16127442996.

The previous prime is 16127442949. The next prime is 16127443027. The reversal of 16127442997 is 79924472161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14007669316 + 2119773681 = 118354^2 + 46041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16127442997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16127442907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8063721498 + 8063721499.

It is an arithmetic number, because the mean of its divisors is an integer number (8063721499).

Almost surely, 2^16127442997 is an apocalyptic number.

It is an amenable number.

16127442997 is a deficient number, since it is larger than the sum of its proper divisors (1).

16127442997 is an equidigital number, since it uses as much as digits as its factorization.

16127442997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The spelling of 16127442997 in words is "sixteen billion, one hundred twenty-seven million, four hundred forty-two thousand, nine hundred ninety-seven".