85435887841 has 2 divisors, whose sum is σ = 85435887842. Its totient is φ = 85435887840.

The previous prime is 85435887833. The next prime is 85435887857. The reversal of 85435887841 is 14878853458.

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., 62490000400 + 22945887441 = 249980^2 + 151479^2 .

It is a cyclic number.

It is not a de Polignac number, because 85435887841 - 2³ = 85435887833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85435887841.

It is not a weakly prime, because it can be changed into another prime (85435887821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42717943920 + 42717943921.

It is an arithmetic number, because the mean of its divisors is an integer number (42717943921).

Almost surely, 2^85435887841 is an apocalyptic number.

It is an amenable number.

85435887841 is a deficient number, since it is larger than the sum of its proper divisors (1).

85435887841 is an equidigital number, since it uses as much as digits as its factorization.

85435887841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34406400, while the sum is 61.

The spelling of 85435887841 in words is "eighty-five billion, four hundred thirty-five million, eight hundred eighty-seven thousand, eight hundred forty-one".