85646556085 has 4 divisors (see below), whose sum is σ = 102775867308. Its totient is φ = 68517244864.

The previous prime is 85646556077. The next prime is 85646556091. The reversal of 85646556085 is 58065564658.

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 53702500644 + 31944055441 = 231738^2 + 178729^2 .

It is a cyclic number.

It is not a de Polignac number, because 85646556085 - 2³ = 85646556077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8564655604 + ... + 8564655613.

It is an arithmetic number, because the mean of its divisors is an integer number (25693966827).

Almost surely, 2^85646556085 is an apocalyptic number.

It is an amenable number.

85646556085 is a deficient number, since it is larger than the sum of its proper divisors (17129311223).

85646556085 is a wasteful number, since it uses less digits than its factorization.

85646556085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17129311222.

The product of its (nonzero) digits is 34560000, while the sum is 58.

The spelling of 85646556085 in words is "eighty-five billion, six hundred forty-six million, five hundred fifty-six thousand, eighty-five".