85841378957 has 2 divisors, whose sum is σ = 85841378958. Its totient is φ = 85841378956.

The previous prime is 85841378933. The next prime is 85841378989. The reversal of 85841378957 is 75987314858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43605374761 + 42236004196 = 208819^2 + 205514^2 .

It is a cyclic number.

It is not a de Polignac number, because 85841378957 - 2²⁴ = 85824601741 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85841378893 and 85841378902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85841378057) 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, 42920689478 + 42920689479.

It is an arithmetic number, because the mean of its divisors is an integer number (42920689479).

Almost surely, 2^85841378957 is an apocalyptic number.

It is an amenable number.

85841378957 is a deficient number, since it is larger than the sum of its proper divisors (1).

85841378957 is an equidigital number, since it uses as much as digits as its factorization.

85841378957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67737600, while the sum is 65.

The spelling of 85841378957 in words is "eighty-five billion, eight hundred forty-one million, three hundred seventy-eight thousand, nine hundred fifty-seven".