851685004 has 12 divisors (see below), whose sum is σ = 1525110664. Its totient is φ = 415939104.

The previous prime is 851684957. The next prime is 851685031. The reversal of 851685004 is 400586158.

851685004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2475657 + ... + 2476000.

Almost surely, 2^851685004 is an apocalyptic number.

It is an amenable number.

851685004 is a deficient number, since it is larger than the sum of its proper divisors (673425660).

851685004 is a wasteful number, since it uses less digits than its factorization.

851685004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951704 (or 4951702 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 851685004 is about 29183.6427472651. The cubic root of 851685004 is about 947.8937655055.

The spelling of 851685004 in words is "eight hundred fifty-one million, six hundred eighty-five thousand, four".