857680936089 has 4 divisors (see below), whose sum is σ = 1143574581456. Its totient is φ = 571787290724.

The previous prime is 857680936051. The next prime is 857680936103. The reversal of 857680936089 is 980639086758.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 857680936089 - 2²³ = 857672547481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857680936589) 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, 142946822679 + ... + 142946822684.

It is an arithmetic number, because the mean of its divisors is an integer number (285893645364).

Almost surely, 2^857680936089 is an apocalyptic number.

It is an amenable number.

857680936089 is a deficient number, since it is larger than the sum of its proper divisors (285893645367).

857680936089 is a wasteful number, since it uses less digits than its factorization.

857680936089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285893645366.

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 857680936089 in words is "eight hundred fifty-seven billion, six hundred eighty million, nine hundred thirty-six thousand, eighty-nine".