857871970144 has 24 divisors (see below), whose sum is σ = 1930211933328. Its totient is φ = 367659415680.

The previous prime is 857871970133. The next prime is 857871970147. The reversal of 857871970144 is 441079178758.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857871970147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914892567 + ... + 1914893014.

It is an arithmetic number, because the mean of its divisors is an integer number (80425497222).

Almost surely, 2^857871970144 is an apocalyptic number.

It is an amenable number.

857871970144 is an abundant number, since it is smaller than the sum of its proper divisors (1072339963184).

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

857871970144 is a wasteful number, since it uses less digits than its factorization.

857871970144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829785598 (or 3829785590 counting only the distinct ones).

The product of its (nonzero) digits is 15805440, while the sum is 61.

The spelling of 857871970144 in words is "eight hundred fifty-seven billion, eight hundred seventy-one million, nine hundred seventy thousand, one hundred forty-four".