857143560840 has 64 divisors (see below), whose sum is σ = 2938777925760. Its totient is φ = 195918528000.

The previous prime is 857143560737. The next prime is 857143560859. The reversal of 857143560840 is 48065341758.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510203661 + ... + 510205340.

It is an arithmetic number, because the mean of its divisors is an integer number (45918405090).

Almost surely, 2^857143560840 is an apocalyptic number.

It is an amenable number.

857143560840 is an abundant number, since it is smaller than the sum of its proper divisors (2081634364920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857143560840 is a wasteful number, since it uses less digits than its factorization.

857143560840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020409022 (or 1020409018 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 51.

The spelling of 857143560840 in words is "eight hundred fifty-seven billion, one hundred forty-three million, five hundred sixty thousand, eight hundred forty".