856323317205 has 40 divisors (see below), whose sum is σ = 1541801286432. Its totient is φ = 454693800672.

The previous prime is 856323317191. The next prime is 856323317249. The reversal of 856323317205 is 502713323658.

856323317205 is a `hidden beast` number, since 8 + 5 + 6 + 323 + 317 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 856323317205 - 2²⁰ = 856322268629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4565287 + ... + 4749156.

Almost surely, 2^856323317205 is an apocalyptic number.

It is an amenable number.

856323317205 is a deficient number, since it is larger than the sum of its proper divisors (685477969227).

856323317205 is a wasteful number, since it uses less digits than its factorization.

856323317205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314687 (or 9314678 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 856323317205 in words is "eight hundred fifty-six billion, three hundred twenty-three million, three hundred seventeen thousand, two hundred five".