857230078643 has 4 divisors (see below), whose sum is σ = 861581500560. Its totient is φ = 852878656728.

The previous prime is 857230078637. The next prime is 857230078651. The reversal of 857230078643 is 346870032758.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857230078643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857230078633) 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, 2175710663 + ... + 2175711056.

It is an arithmetic number, because the mean of its divisors is an integer number (215395375140).

Almost surely, 2^857230078643 is an apocalyptic number.

857230078643 is a deficient number, since it is larger than the sum of its proper divisors (4351421917).

857230078643 is a wasteful number, since it uses less digits than its factorization.

857230078643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351421916.

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 857230078643 in words is "eight hundred fifty-seven billion, two hundred thirty million, seventy-eight thousand, six hundred forty-three".