85418844877 has 2 divisors, whose sum is σ = 85418844878. Its totient is φ = 85418844876.

The previous prime is 85418844871. The next prime is 85418844971. The reversal of 85418844877 is 77844881458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84789286596 + 629558281 = 291186^2 + 25091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85418844877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85418844871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42709422438 + 42709422439.

It is an arithmetic number, because the mean of its divisors is an integer number (42709422439).

Almost surely, 2^85418844877 is an apocalyptic number.

It is an amenable number.

85418844877 is a deficient number, since it is larger than the sum of its proper divisors (1).

85418844877 is an equidigital number, since it uses as much as digits as its factorization.

85418844877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64225280, while the sum is 64.

The spelling of 85418844877 in words is "eighty-five billion, four hundred eighteen million, eight hundred forty-four thousand, eight hundred seventy-seven".