85504440577 has 2 divisors, whose sum is σ = 85504440578. Its totient is φ = 85504440576.

The previous prime is 85504440557. The next prime is 85504440587. The reversal of 85504440577 is 77504440558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59395051521 + 26109389056 = 243711^2 + 161584^2 .

It is a cyclic number.

It is not a de Polignac number, because 85504440577 - 2²⁷ = 85370222849 is a prime.

It is a super-2 number, since 2×85504440577² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85504440577.

It is not a weakly prime, because it can be changed into another prime (85504440557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42752220288 + 42752220289.

It is an arithmetic number, because the mean of its divisors is an integer number (42752220289).

Almost surely, 2^85504440577 is an apocalyptic number.

It is an amenable number.

85504440577 is a deficient number, since it is larger than the sum of its proper divisors (1).

85504440577 is an equidigital number, since it uses as much as digits as its factorization.

85504440577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136000, while the sum is 49.

The spelling of 85504440577 in words is "eighty-five billion, five hundred four million, four hundred forty thousand, five hundred seventy-seven".