85846664857 has 4 divisors (see below), whose sum is σ = 86522622976. Its totient is φ = 85170706740.

The previous prime is 85846664851. The next prime is 85846664993. The reversal of 85846664857 is 75846664858.

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 a de Polignac number, because none of the positive numbers 2^k-85846664857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85846664792 and 85846664801.

It is not an unprimeable number, because it can be changed into a prime (85846664851) 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, 337978869 + ... + 337979122.

It is an arithmetic number, because the mean of its divisors is an integer number (21630655744).

Almost surely, 2^85846664857 is an apocalyptic number.

It is an amenable number.

85846664857 is a deficient number, since it is larger than the sum of its proper divisors (675958119).

85846664857 is a wasteful number, since it uses less digits than its factorization.

85846664857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675958118.

The product of its digits is 309657600, while the sum is 67.

Subtracting from 85846664857 its reverse (75846664858), we obtain a palindrome (9999999999).

The spelling of 85846664857 in words is "eighty-five billion, eight hundred forty-six million, six hundred sixty-four thousand, eight hundred fifty-seven".