857143785723 has 8 divisors (see below), whose sum is σ = 1144267580736. Its totient is φ = 570724590600.

The previous prime is 857143785703. The next prime is 857143785767. The reversal of 857143785723 is 327587341758.

857143785723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 857143785723 - 2²⁰ = 857142737147 is a prime.

It is a super-2 number, since 2×857143785723² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (857143785703) 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, 176147133 + ... + 176151998.

It is an arithmetic number, because the mean of its divisors is an integer number (143033447592).

Almost surely, 2^857143785723 is an apocalyptic number.

857143785723 is a deficient number, since it is larger than the sum of its proper divisors (287123795013).

857143785723 is a wasteful number, since it uses less digits than its factorization.

857143785723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352299945.

The product of its digits is 39513600, while the sum is 60.

The spelling of 857143785723 in words is "eight hundred fifty-seven billion, one hundred forty-three million, seven hundred eighty-five thousand, seven hundred twenty-three".