16591406217839 has 2 divisors, whose sum is σ = 16591406217840. Its totient is φ = 16591406217838.

The previous prime is 16591406217811. The next prime is 16591406217913. The reversal of 16591406217839 is 93871260419561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16591406217839 - 2²⁸ = 16591137782383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16591406217809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8295703108919 + 8295703108920.

It is an arithmetic number, because the mean of its divisors is an integer number (8295703108920).

It is a 1-persistent number, because it is pandigital, but 2⋅16591406217839 = 33182812435678 is not.

Almost surely, 2^{16591406217839} is an apocalyptic number.

16591406217839 is a deficient number, since it is larger than the sum of its proper divisors (1).

16591406217839 is an equidigital number, since it uses as much as digits as its factorization.

16591406217839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 62.

The spelling of 16591406217839 in words is "sixteen trillion, five hundred ninety-one billion, four hundred six million, two hundred seventeen thousand, eight hundred thirty-nine".