857143657143 has 12 divisors (see below), whose sum is σ = 1258393056648. Its totient is φ = 562061414160.

The previous prime is 857143657133. The next prime is 857143657207. The reversal of 857143657143 is 341756341758.

857143657143 is a `hidden beast` number, since 8 + 57 + 14 + 3 + 6 + 571 + 4 + 3 = 666.

It is not a de Polignac number, because 857143657143 - 2⁴ = 857143657127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 857143657143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857143657133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 780640305 + ... + 780641402.

It is an arithmetic number, because the mean of its divisors is an integer number (104866088054).

Almost surely, 2^857143657143 is an apocalyptic number.

857143657143 is a deficient number, since it is larger than the sum of its proper divisors (401249399505).

857143657143 is a wasteful number, since it uses less digits than its factorization.

857143657143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561281774 (or 1561281771 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 54.

The spelling of 857143657143 in words is "eight hundred fifty-seven billion, one hundred forty-three million, six hundred fifty-seven thousand, one hundred forty-three".