85804578133 has 2 divisors, whose sum is σ = 85804578134. Its totient is φ = 85804578132.

The previous prime is 85804578121. The next prime is 85804578137. The reversal of 85804578133 is 33187540858.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84389088004 + 1415490129 = 290498^2 + 37623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85804578133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85804578137) 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, 42902289066 + 42902289067.

It is an arithmetic number, because the mean of its divisors is an integer number (42902289067).

Almost surely, 2^85804578133 is an apocalyptic number.

It is an amenable number.

85804578133 is a deficient number, since it is larger than the sum of its proper divisors (1).

85804578133 is an equidigital number, since it uses as much as digits as its factorization.

85804578133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3225600, while the sum is 52.

The spelling of 85804578133 in words is "eighty-five billion, eight hundred four million, five hundred seventy-eight thousand, one hundred thirty-three".