855870577 has 2 divisors, whose sum is σ = 855870578. Its totient is φ = 855870576.

The previous prime is 855870571. The next prime is 855870601. The reversal of 855870577 is 775078558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499567201 + 356303376 = 22351^2 + 18876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855870577 is a prime.

It is not a weakly prime, because it can be changed into another prime (855870571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427935288 + 427935289.

It is an arithmetic number, because the mean of its divisors is an integer number (427935289).

Almost surely, 2^855870577 is an apocalyptic number.

It is an amenable number.

855870577 is a deficient number, since it is larger than the sum of its proper divisors (1).

855870577 is an equidigital number, since it uses as much as digits as its factorization.

855870577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2744000, while the sum is 52.

The square root of 855870577 is about 29255.2657995104. The cubic root of 855870577 is about 949.4440244549. Note that the first 3 decimals are identical.

The spelling of 855870577 in words is "eight hundred fifty-five million, eight hundred seventy thousand, five hundred seventy-seven".