855469317077 has 2 divisors, whose sum is σ = 855469317078. Its totient is φ = 855469317076.

The previous prime is 855469317007. The next prime is 855469317089. The reversal of 855469317077 is 770713964558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813181918756 + 42287398321 = 901766^2 + 205639^2 .

It is a cyclic number.

It is not a de Polignac number, because 855469317077 - 2¹⁶ = 855469251541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855469317007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427734658538 + 427734658539.

It is an arithmetic number, because the mean of its divisors is an integer number (427734658539).

Almost surely, 2^855469317077 is an apocalyptic number.

It is an amenable number.

855469317077 is a deficient number, since it is larger than the sum of its proper divisors (1).

855469317077 is an equidigital number, since it uses as much as digits as its factorization.

855469317077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44452800, while the sum is 62.

The spelling of 855469317077 in words is "eight hundred fifty-five billion, four hundred sixty-nine million, three hundred seventeen thousand, seventy-seven".