857426207356386 has 24 divisors (see below), whose sum is σ = 1857757402024524. Its totient is φ = 285808640490240.

The previous prime is 857426207356253. The next prime is 857426207356387. The reversal of 857426207356386 is 683653702624758.

857426207356386 is a `hidden beast` number, since 8 + 5 + 7 + 4 + 2 + 6 + 207 + 35 + 6 + 386 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 853236076142025 + 4190131214361 = 29210205^2 + 2046981^2 .

It is not an unprimeable number, because it can be changed into a prime (857426207356387) 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 11 ways as a sum of consecutive naturals, for example, 66304726 + ... + 78173966.

Almost surely, 2^{857426207356386} is an apocalyptic number.

857426207356386 is an abundant number, since it is smaller than the sum of its proper divisors (1000331194668138).

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

857426207356386 is a wasteful number, since it uses less digits than its factorization.

857426207356386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15882546 (or 15882543 counting only the distinct ones).

The product of its (nonzero) digits is 2438553600, while the sum is 72.

The spelling of 857426207356386 in words is "eight hundred fifty-seven trillion, four hundred twenty-six billion, two hundred seven million, three hundred fifty-six thousand, three hundred eighty-six".