856768057 has 4 divisors (see below), whose sum is σ = 907166196. Its totient is φ = 806369920.

The previous prime is 856768043. The next prime is 856768063. The reversal of 856768057 is 750867658.

856768057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 646634041 + 210134016 = 25429^2 + 14496^2 .

It is a cyclic number.

It is not a de Polignac number, because 856768057 - 2⁷ = 856767929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 856767995 and 856768013.

It is not an unprimeable number, because it can be changed into a prime (856768037) 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, 25199044 + ... + 25199077.

It is an arithmetic number, because the mean of its divisors is an integer number (226791549).

Almost surely, 2^856768057 is an apocalyptic number.

It is an amenable number.

856768057 is a deficient number, since it is larger than the sum of its proper divisors (50398139).

856768057 is a wasteful number, since it uses less digits than its factorization.

856768057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50398138.

The product of its (nonzero) digits is 2822400, while the sum is 52.

The square root of 856768057 is about 29270.6005575560. The cubic root of 856768057 is about 949.7757760752.

The spelling of 856768057 in words is "eight hundred fifty-six million, seven hundred sixty-eight thousand, fifty-seven".