85820218311 has 4 divisors (see below), whose sum is σ = 114426957752. Its totient is φ = 57213478872.

The previous prime is 85820218301. The next prime is 85820218339. The reversal of 85820218311 is 11381202858.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85820218311 - 2¹⁷ = 85820087239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85820218311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85820218301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14303369716 + ... + 14303369721.

It is an arithmetic number, because the mean of its divisors is an integer number (28606739438).

Almost surely, 2^85820218311 is an apocalyptic number.

85820218311 is a deficient number, since it is larger than the sum of its proper divisors (28606739441).

85820218311 is a wasteful number, since it uses less digits than its factorization.

85820218311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28606739440.

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 85820218311 in words is "eighty-five billion, eight hundred twenty million, two hundred eighteen thousand, three hundred eleven".