16208591389 has 2 divisors, whose sum is σ = 16208591390. Its totient is φ = 16208591388.

The previous prime is 16208591341. The next prime is 16208591417. The reversal of 16208591389 is 98319580261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14776347364 + 1432244025 = 121558^2 + 37845^2 .

It is a cyclic number.

It is not a de Polignac number, because 16208591389 - 2¹³ = 16208583197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16208591489) 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, 8104295694 + 8104295695.

It is an arithmetic number, because the mean of its divisors is an integer number (8104295695).

Almost surely, 2^16208591389 is an apocalyptic number.

It is an amenable number.

16208591389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16208591389 is an equidigital number, since it uses as much as digits as its factorization.

16208591389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 52.

The spelling of 16208591389 in words is "sixteen billion, two hundred eight million, five hundred ninety-one thousand, three hundred eighty-nine".