857046242617 has 4 divisors (see below), whose sum is σ = 857097386640. Its totient is φ = 856995098596.

The previous prime is 857046242609. The next prime is 857046242627. The reversal of 857046242617 is 716242640758.

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, and also an emirpimes, since its reverse is a distinct semiprime: 716242640758 = 2 ⋅358121320379.

It is a cyclic number.

It is not a de Polignac number, because 857046242617 - 2³ = 857046242609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857046242627) 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, 25546867 + ... + 25580392.

It is an arithmetic number, because the mean of its divisors is an integer number (214274346660).

Almost surely, 2^857046242617 is an apocalyptic number.

It is an amenable number.

857046242617 is a deficient number, since it is larger than the sum of its proper divisors (51144023).

857046242617 is a wasteful number, since it uses less digits than its factorization.

857046242617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51144022.

The product of its (nonzero) digits is 4515840, while the sum is 52.

The spelling of 857046242617 in words is "eight hundred fifty-seven billion, forty-six million, two hundred forty-two thousand, six hundred seventeen".