857148042851 has 4 divisors (see below), whose sum is σ = 857149904232. Its totient is φ = 857146181472.

The previous prime is 857148042757. The next prime is 857148042869. The reversal of 857148042851 is 158240841758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 857148042851 - 2³⁸ = 582270135907 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 857148042793 and 857148042802.

It is not an unprimeable number, because it can be changed into a prime (857148042151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322760 + ... + 1348506.

It is an arithmetic number, because the mean of its divisors is an integer number (214287476058).

Almost surely, 2^857148042851 is an apocalyptic number.

857148042851 is a deficient number, since it is larger than the sum of its proper divisors (1861381).

857148042851 is a wasteful number, since it uses less digits than its factorization.

857148042851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861380.

The product of its (nonzero) digits is 2867200, while the sum is 53.

The spelling of 857148042851 in words is "eight hundred fifty-seven billion, one hundred forty-eight million, forty-two thousand, eight hundred fifty-one".