855489836161 has 2 divisors, whose sum is σ = 855489836162. Its totient is φ = 855489836160.

The previous prime is 855489836153. The next prime is 855489836177. The reversal of 855489836161 is 161638984558.

855489836161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 804709467136 + 50780369025 = 897056^2 + 225345^2 .

It is a cyclic number.

It is not a de Polignac number, because 855489836161 - 2³ = 855489836153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 855489836093 and 855489836102.

It is not a weakly prime, because it can be changed into another prime (855489836191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427744918080 + 427744918081.

It is an arithmetic number, because the mean of its divisors is an integer number (427744918081).

Almost surely, 2^855489836161 is an apocalyptic number.

It is an amenable number.

855489836161 is a deficient number, since it is larger than the sum of its proper divisors (1).

855489836161 is an equidigital number, since it uses as much as digits as its factorization.

855489836161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49766400, while the sum is 64.

The spelling of 855489836161 in words is "eight hundred fifty-five billion, four hundred eighty-nine million, eight hundred thirty-six thousand, one hundred sixty-one".