85263866221 has 4 divisors (see below), whose sum is σ = 85267062432. Its totient is φ = 85260670012.

The previous prime is 85263866201. The next prime is 85263866263. The reversal of 85263866221 is 12266836258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85263866221 - 2⁵ = 85263866189 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85263866201) 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, 1557751 + ... + 1611556.

It is an arithmetic number, because the mean of its divisors is an integer number (21316765608).

Almost surely, 2^85263866221 is an apocalyptic number.

It is an amenable number.

85263866221 is a deficient number, since it is larger than the sum of its proper divisors (3196211).

85263866221 is a wasteful number, since it uses less digits than its factorization.

85263866221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196210.

The product of its digits is 1658880, while the sum is 49.

The spelling of 85263866221 in words is "eighty-five billion, two hundred sixty-three million, eight hundred sixty-six thousand, two hundred twenty-one".