855773641 has 2 divisors, whose sum is σ = 855773642. Its totient is φ = 855773640.

The previous prime is 855773621. The next prime is 855773717. The reversal of 855773641 is 146377558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 852406416 + 3367225 = 29196^2 + 1835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855773641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 855773591 and 855773600.

It is not a weakly prime, because it can be changed into another prime (855773621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427886820 + 427886821.

It is an arithmetic number, because the mean of its divisors is an integer number (427886821).

Almost surely, 2^855773641 is an apocalyptic number.

It is an amenable number.

855773641 is a deficient number, since it is larger than the sum of its proper divisors (1).

855773641 is an equidigital number, since it uses as much as digits as its factorization.

855773641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 46.

The square root of 855773641 is about 29253.6090252126. The cubic root of 855773641 is about 949.4081783885.

The spelling of 855773641 in words is "eight hundred fifty-five million, seven hundred seventy-three thousand, six hundred forty-one".