85851218866 has 32 divisors (see below), whose sum is σ = 159146353152. Its totient is φ = 33892270080.

The previous prime is 85851218861. The next prime is 85851218897. The reversal of 85851218866 is 66881215858.

It is a self number, because there is not a number n which added to its sum of digits gives 85851218866.

It is not an unprimeable number, because it can be changed into a prime (85851218861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3826255 + ... + 3848626.

It is an arithmetic number, because the mean of its divisors is an integer number (4973323536).

Almost surely, 2^85851218866 is an apocalyptic number.

85851218866 is a deficient number, since it is larger than the sum of its proper divisors (73295134286).

85851218866 is a wasteful number, since it uses less digits than its factorization.

85851218866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674954.

The product of its digits is 7372800, while the sum is 58.

The spelling of 85851218866 in words is "eighty-five billion, eight hundred fifty-one million, two hundred eighteen thousand, eight hundred sixty-six".