16506444277 has 2 divisors, whose sum is σ = 16506444278. Its totient is φ = 16506444276.

The previous prime is 16506444259. The next prime is 16506444281. The reversal of 16506444277 is 77244460561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15645256561 + 861187716 = 125081^2 + 29346^2 .

It is a cyclic number.

It is not a de Polignac number, because 16506444277 - 2¹¹ = 16506442229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16506444217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8253222138 + 8253222139.

It is an arithmetic number, because the mean of its divisors is an integer number (8253222139).

Almost surely, 2^16506444277 is an apocalyptic number.

It is an amenable number.

16506444277 is a deficient number, since it is larger than the sum of its proper divisors (1).

16506444277 is an equidigital number, since it uses as much as digits as its factorization.

16506444277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 16506444277 in words is "sixteen billion, five hundred six million, four hundred forty-four thousand, two hundred seventy-seven".