857944372158 has 48 divisors (see below), whose sum is σ = 1909456058016. Its totient is φ = 278203170240.

The previous prime is 857944372157. The next prime is 857944372163. The reversal of 857944372158 is 851273449758.

857944372158 is a `hidden beast` number, since 8 + 5 + 79 + 44 + 372 + 158 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 857944372095 and 857944372104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857944372151) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3766135 + ... + 3987437.

It is an arithmetic number, because the mean of its divisors is an integer number (39780334542).

Almost surely, 2^857944372158 is an apocalyptic number.

857944372158 is an abundant number, since it is smaller than the sum of its proper divisors (1051511685858).

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

857944372158 is a wasteful number, since it uses less digits than its factorization.

857944372158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227169 (or 227166 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 857944372158 in words is "eight hundred fifty-seven billion, nine hundred forty-four million, three hundred seventy-two thousand, one hundred fifty-eight".