856317512 has 16 divisors (see below), whose sum is σ = 1631917500. Its totient is φ = 421139520.

The previous prime is 856317467. The next prime is 856317559. The reversal of 856317512 is 215713658.

It can be written as a sum of positive squares in 2 ways, for example, as 521939716 + 334377796 = 22846^2 + 18286^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876887 + ... + 877862.

Almost surely, 2^856317512 is an apocalyptic number.

It is an amenable number.

856317512 is a deficient number, since it is larger than the sum of its proper divisors (775599988).

856317512 is a wasteful number, since it uses less digits than its factorization.

856317512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754816 (or 1754812 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 856317512 is about 29262.9033419447. The cubic root of 856317512 is about 949.6092620250.

The spelling of 856317512 in words is "eight hundred fifty-six million, three hundred seventeen thousand, five hundred twelve".