857641718458 has 8 divisors (see below), whose sum is σ = 1470242945952. Its totient is φ = 367560736476.

The previous prime is 857641718431. The next prime is 857641718459. The reversal of 857641718458 is 854817146758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 857641718458.

It is not an unprimeable number, because it can be changed into a prime (857641718459) 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 3 ways as a sum of consecutive naturals, for example, 30630061360 + ... + 30630061387.

It is an arithmetic number, because the mean of its divisors is an integer number (183780368244).

Almost surely, 2^857641718458 is an apocalyptic number.

857641718458 is a deficient number, since it is larger than the sum of its proper divisors (612601227494).

857641718458 is a wasteful number, since it uses less digits than its factorization.

857641718458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61260122756.

The product of its digits is 60211200, while the sum is 64.

The spelling of 857641718458 in words is "eight hundred fifty-seven billion, six hundred forty-one million, seven hundred eighteen thousand, four hundred fifty-eight".