856685870893 has 8 divisors (see below), whose sum is σ = 903810218400. Its totient is φ = 809765085168.

The previous prime is 856685870839. The next prime is 856685870903. The reversal of 856685870893 is 398078586658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 856685870893 - 2¹³ = 856685862701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856685874893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50881798 + ... + 50898631.

It is an arithmetic number, because the mean of its divisors is an integer number (112976277300).

Almost surely, 2^856685870893 is an apocalyptic number.

It is an amenable number.

856685870893 is a deficient number, since it is larger than the sum of its proper divisors (47124347507).

856685870893 is a wasteful number, since it uses less digits than its factorization.

856685870893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101780891.

The product of its (nonzero) digits is 696729600, while the sum is 73.

The spelling of 856685870893 in words is "eight hundred fifty-six billion, six hundred eighty-five million, eight hundred seventy thousand, eight hundred ninety-three".