85504204777 has 2 divisors, whose sum is σ = 85504204778. Its totient is φ = 85504204776.

The previous prime is 85504204763. The next prime is 85504204801. The reversal of 85504204777 is 77740240558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61712993241 + 23791211536 = 248421^2 + 154244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85504204777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85504204777.

It is not a weakly prime, because it can be changed into another prime (85504201777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42752102388 + 42752102389.

It is an arithmetic number, because the mean of its divisors is an integer number (42752102389).

Almost surely, 2^85504204777 is an apocalyptic number.

It is an amenable number.

85504204777 is a deficient number, since it is larger than the sum of its proper divisors (1).

85504204777 is an equidigital number, since it uses as much as digits as its factorization.

85504204777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2195200, while the sum is 49.

The spelling of 85504204777 in words is "eighty-five billion, five hundred four million, two hundred four thousand, seven hundred seventy-seven".