8505745901 has 2 divisors, whose sum is σ = 8505745902. Its totient is φ = 8505745900.

The previous prime is 8505745889. The next prime is 8505745921. The reversal of 8505745901 is 1095475058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4764588676 + 3741157225 = 69026^2 + 61165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8505745901 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8505745921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4252872950 + 4252872951.

It is an arithmetic number, because the mean of its divisors is an integer number (4252872951).

Almost surely, 2^8505745901 is an apocalyptic number.

It is an amenable number.

8505745901 is a deficient number, since it is larger than the sum of its proper divisors (1).

8505745901 is an equidigital number, since it uses as much as digits as its factorization.

8505745901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 44.

The square root of 8505745901 is about 92226.6008318641. The cubic root of 8505745901 is about 2041.2873059295.

The spelling of 8505745901 in words is "eight billion, five hundred five million, seven hundred forty-five thousand, nine hundred one".