85206621321867 has 4 divisors (see below), whose sum is σ = 113608828429160. Its totient is φ = 56804414214576.

The previous prime is 85206621321853. The next prime is 85206621321869. The reversal of 85206621321867 is 76812312660258.

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

It is not a de Polignac number, because 85206621321867 - 2⁷ = 85206621321739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85206621321869) 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, 14201103553642 + ... + 14201103553647.

It is an arithmetic number, because the mean of its divisors is an integer number (28402207107290).

Almost surely, 2^{85206621321867} is an apocalyptic number.

85206621321867 is a deficient number, since it is larger than the sum of its proper divisors (28402207107293).

85206621321867 is a wasteful number, since it uses less digits than its factorization.

85206621321867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28402207107292.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 85206621321867 in words is "eighty-five trillion, two hundred six billion, six hundred twenty-one million, three hundred twenty-one thousand, eight hundred sixty-seven".