851009185085 has 16 divisors (see below), whose sum is σ = 1022396656512. Its totient is φ = 680017291200.

The previous prime is 851009185079. The next prime is 851009185121. The reversal of 851009185085 is 580581900158.

It is not a de Polignac number, because 851009185085 - 2¹⁴ = 851009168701 is a prime.

It is a Duffinian number.

It is a congruent 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, 20712032 + ... + 20753078.

It is an arithmetic number, because the mean of its divisors is an integer number (63899791032).

Almost surely, 2^851009185085 is an apocalyptic number.

It is an amenable number.

851009185085 is a deficient number, since it is larger than the sum of its proper divisors (171387471427).

851009185085 is a wasteful number, since it uses less digits than its factorization.

851009185085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45764.

The product of its (nonzero) digits is 576000, while the sum is 50.

The spelling of 851009185085 in words is "eight hundred fifty-one billion, nine million, one hundred eighty-five thousand, eighty-five".