855830258077 has 2 divisors, whose sum is σ = 855830258078. Its totient is φ = 855830258076.

The previous prime is 855830258057. The next prime is 855830258081. The reversal of 855830258077 is 770852038558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 789172829316 + 66657428761 = 888354^2 + 258181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855830258077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855830258057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427915129038 + 427915129039.

It is an arithmetic number, because the mean of its divisors is an integer number (427915129039).

Almost surely, 2^855830258077 is an apocalyptic number.

It is an amenable number.

855830258077 is a deficient number, since it is larger than the sum of its proper divisors (1).

855830258077 is an equidigital number, since it uses as much as digits as its factorization.

855830258077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816000, while the sum is 58.

The spelling of 855830258077 in words is "eight hundred fifty-five billion, eight hundred thirty million, two hundred fifty-eight thousand, seventy-seven".