851208013385 has 16 divisors (see below), whose sum is σ = 1059522144384. Its totient is φ = 656018600832.

The previous prime is 851208013373. The next prime is 851208013433. The reversal of 851208013385 is 583310802158.

It is a cyclic number.

It is not a de Polignac number, because 851208013385 - 2⁶ = 851208013321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27101477 + ... + 27132866.

It is an arithmetic number, because the mean of its divisors is an integer number (66220134024).

Almost surely, 2^851208013385 is an apocalyptic number.

It is an amenable number.

851208013385 is a deficient number, since it is larger than the sum of its proper divisors (208314130999).

851208013385 is a wasteful number, since it uses less digits than its factorization.

851208013385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54234464.

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 851208013385 in words is "eight hundred fifty-one billion, two hundred eight million, thirteen thousand, three hundred eighty-five".