845800857 has 12 divisors (see below), whose sum is σ = 1332777264. Its totient is φ = 512606520.

The previous prime is 845800843. The next prime is 845800859. The reversal of 845800857 is 758008548.

It is not a de Polignac number, because 845800857 - 2¹⁶ = 845735321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (845800859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4271623 + ... + 4271820.

It is an arithmetic number, because the mean of its divisors is an integer number (111064772).

Almost surely, 2^845800857 is an apocalyptic number.

It is an amenable number.

845800857 is a deficient number, since it is larger than the sum of its proper divisors (486976407).

845800857 is a wasteful number, since it uses less digits than its factorization.

845800857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543460 (or 8543457 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 45.

The square root of 845800857 is about 29082.6556043288. The cubic root of 845800857 is about 945.7057732575.

The spelling of 845800857 in words is "eight hundred forty-five million, eight hundred thousand, eight hundred fifty-seven".