855605712329 has 2 divisors, whose sum is σ = 855605712330. Its totient is φ = 855605712328.

The previous prime is 855605712301. The next prime is 855605712391. The reversal of 855605712329 is 923217506558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 825050672329 + 30555040000 = 908323^2 + 174800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855605712329 is a prime.

It is a super-2 number, since 2×855605712329² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (855605712629) 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, 427802856164 + 427802856165.

It is an arithmetic number, because the mean of its divisors is an integer number (427802856165).

Almost surely, 2^855605712329 is an apocalyptic number.

It is an amenable number.

855605712329 is a deficient number, since it is larger than the sum of its proper divisors (1).

855605712329 is an equidigital number, since it uses as much as digits as its factorization.

855605712329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 855605712329 in words is "eight hundred fifty-five billion, six hundred five million, seven hundred twelve thousand, three hundred twenty-nine".