16421027377 has 2 divisors, whose sum is σ = 16421027378. Its totient is φ = 16421027376.

The previous prime is 16421027333. The next prime is 16421027401. The reversal of 16421027377 is 77372012461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10267566241 + 6153461136 = 101329^2 + 78444^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16421027377 is a prime.

It is not a weakly prime, because it can be changed into another prime (16421027317) 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 as a sum of consecutive naturals, namely, 8210513688 + 8210513689.

It is an arithmetic number, because the mean of its divisors is an integer number (8210513689).

Almost surely, 2^16421027377 is an apocalyptic number.

It is an amenable number.

16421027377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16421027377 is an equidigital number, since it uses as much as digits as its factorization.

16421027377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The spelling of 16421027377 in words is "sixteen billion, four hundred twenty-one million, twenty-seven thousand, three hundred seventy-seven".