85571036857 has 2 divisors, whose sum is σ = 85571036858. Its totient is φ = 85571036856.

The previous prime is 85571036843. The next prime is 85571036879. The reversal of 85571036857 is 75863017558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72488023696 + 13083013161 = 269236^2 + 114381^2 .

It is a cyclic number.

It is not a de Polignac number, because 85571036857 - 2⁷ = 85571036729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85571036798 and 85571036807.

It is not a weakly prime, because it can be changed into another prime (85571036827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42785518428 + 42785518429.

It is an arithmetic number, because the mean of its divisors is an integer number (42785518429).

Almost surely, 2^85571036857 is an apocalyptic number.

It is an amenable number.

85571036857 is a deficient number, since it is larger than the sum of its proper divisors (1).

85571036857 is an equidigital number, since it uses as much as digits as its factorization.

85571036857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 85571036857 in words is "eighty-five billion, five hundred seventy-one million, thirty-six thousand, eight hundred fifty-seven".