85508775901 has 2 divisors, whose sum is σ = 85508775902. Its totient is φ = 85508775900.

The previous prime is 85508775893. The next prime is 85508775923. The reversal of 85508775901 is 10957780558.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82871439876 + 2637336025 = 287874^2 + 51355^2 .

It is a cyclic number.

It is not a de Polignac number, because 85508775901 - 2³ = 85508775893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85508775971) 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, 42754387950 + 42754387951.

It is an arithmetic number, because the mean of its divisors is an integer number (42754387951).

Almost surely, 2^85508775901 is an apocalyptic number.

It is an amenable number.

85508775901 is a deficient number, since it is larger than the sum of its proper divisors (1).

85508775901 is an equidigital number, since it uses as much as digits as its factorization.

85508775901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 55.

The spelling of 85508775901 in words is "eighty-five billion, five hundred eight million, seven hundred seventy-five thousand, nine hundred one".