855590838439 has 2 divisors, whose sum is σ = 855590838440. Its totient is φ = 855590838438.

The previous prime is 855590838413. The next prime is 855590838449. The reversal of 855590838439 is 934838095558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855590838439 - 2¹³ = 855590830247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855590838449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427795419219 + 427795419220.

It is an arithmetic number, because the mean of its divisors is an integer number (427795419220).

Almost surely, 2^855590838439 is an apocalyptic number.

855590838439 is a deficient number, since it is larger than the sum of its proper divisors (1).

855590838439 is an equidigital number, since it uses as much as digits as its factorization.

855590838439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624000, while the sum is 67.

The spelling of 855590838439 in words is "eight hundred fifty-five billion, five hundred ninety million, eight hundred thirty-eight thousand, four hundred thirty-nine".