857344443757 has 4 divisors (see below), whose sum is σ = 857350272060. Its totient is φ = 857338615456.

The previous prime is 857344443733. The next prime is 857344443773. The reversal of 857344443757 is 757344443758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24932725801 + 832411717956 = 157901^2 + 912366^2 .

It is a cyclic number.

It is not a de Polignac number, because 857344443757 - 2²⁷ = 857210226029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857344443695 and 857344443704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857344441757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2687632 + ... + 2989657.

It is an arithmetic number, because the mean of its divisors is an integer number (214337568015).

Almost surely, 2^857344443757 is an apocalyptic number.

It is an amenable number.

857344443757 is a deficient number, since it is larger than the sum of its proper divisors (5828303).

857344443757 is a wasteful number, since it uses less digits than its factorization.

857344443757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828302.

The product of its digits is 158054400, while the sum is 61.

Subtracting from 857344443757 its reverse (757344443758), we obtain a palindrome (99999999999).

The spelling of 857344443757 in words is "eight hundred fifty-seven billion, three hundred forty-four million, four hundred forty-three thousand, seven hundred fifty-seven".