85869511213 has 2 divisors, whose sum is σ = 85869511214. Its totient is φ = 85869511212.

The previous prime is 85869511199. The next prime is 85869511261. The reversal of 85869511213 is 31211596858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48187713289 + 37681797924 = 219517^2 + 194118^2 .

It is a cyclic number.

It is not a de Polignac number, because 85869511213 - 2⁵ = 85869511181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85869512213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42934755606 + 42934755607.

It is an arithmetic number, because the mean of its divisors is an integer number (42934755607).

Almost surely, 2^85869511213 is an apocalyptic number.

It is an amenable number.

85869511213 is a deficient number, since it is larger than the sum of its proper divisors (1).

85869511213 is an equidigital number, since it uses as much as digits as its factorization.

85869511213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 49.

The spelling of 85869511213 in words is "eighty-five billion, eight hundred sixty-nine million, five hundred eleven thousand, two hundred thirteen".