85525647829 has 2 divisors, whose sum is σ = 85525647830. Its totient is φ = 85525647828.

The previous prime is 85525647787. The next prime is 85525647847. The reversal of 85525647829 is 92874652558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79708534929 + 5817112900 = 282327^2 + 76270^2 .

It is a cyclic number.

It is not a de Polignac number, because 85525647829 - 2¹³ = 85525639637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85525647899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42762823914 + 42762823915.

It is an arithmetic number, because the mean of its divisors is an integer number (42762823915).

Almost surely, 2^85525647829 is an apocalyptic number.

It is an amenable number.

85525647829 is a deficient number, since it is larger than the sum of its proper divisors (1).

85525647829 is an equidigital number, since it uses as much as digits as its factorization.

85525647829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384000, while the sum is 61.

The spelling of 85525647829 in words is "eighty-five billion, five hundred twenty-five million, six hundred forty-seven thousand, eight hundred twenty-nine".