85801578827 has 2 divisors, whose sum is σ = 85801578828. Its totient is φ = 85801578826.

The previous prime is 85801578661. The next prime is 85801578851. The reversal of 85801578827 is 72887510858.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85801578827 - 2¹⁰ = 85801577803 is a prime.

It is not a weakly prime, because it can be changed into another prime (85821578827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42900789413 + 42900789414.

It is an arithmetic number, because the mean of its divisors is an integer number (42900789414).

Almost surely, 2^85801578827 is an apocalyptic number.

85801578827 is a deficient number, since it is larger than the sum of its proper divisors (1).

85801578827 is an equidigital number, since it uses as much as digits as its factorization.

85801578827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10035200, while the sum is 59.

The spelling of 85801578827 in words is "eighty-five billion, eight hundred one million, five hundred seventy-eight thousand, eight hundred twenty-seven".