857143809396 has 108 divisors (see below), whose sum is σ = 2522355004260. Its totient is φ = 244709337600.

The previous prime is 857143809383. The next prime is 857143809421. The reversal of 857143809396 is 693908341758.

857143809396 is a `hidden beast` number, since 85 + 7 + 1 + 4 + 380 + 93 + 96 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4686771600 + 852457037796 = 68460^2 + 923286^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2108220 + ... + 2481708.

Almost surely, 2^857143809396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857143809396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261177502130).

857143809396 is an abundant number, since it is smaller than the sum of its proper divisors (1665211194864).

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

857143809396 is a wasteful number, since it uses less digits than its factorization.

857143809396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374814 (or 374802 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 857143809396 in words is "eight hundred fifty-seven billion, one hundred forty-three million, eight hundred nine thousand, three hundred ninety-six".