857552643 has 16 divisors (see below), whose sum is σ = 1270916640. Its totient is φ = 571491072.

The previous prime is 857552639. The next prime is 857552687. The reversal of 857552643 is 346255758.

857552643 is a `hidden beast` number, since 8 + 57 + 552 + 6 + 43 = 666.

857552643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 857552643 - 2² = 857552639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857550643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111655 + ... + 119087.

It is an arithmetic number, because the mean of its divisors is an integer number (79432290).

Almost surely, 2^857552643 is an apocalyptic number.

857552643 is a deficient number, since it is larger than the sum of its proper divisors (413363997).

857552643 is a wasteful number, since it uses less digits than its factorization.

857552643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11715 (or 11709 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The square root of 857552643 is about 29283.9997780358. Note that the first 3 decimals coincide. The cubic root of 857552643 is about 950.0656069188.

The spelling of 857552643 in words is "eight hundred fifty-seven million, five hundred fifty-two thousand, six hundred forty-three".