85775516091 has 6 divisors (see below), whose sum is σ = 123897967700. Its totient is φ = 57183677388.

The previous prime is 85775516089. The next prime is 85775516111. The reversal of 85775516091 is 19061557758.

It is a happy number.

85775516091 is a `hidden beast` number, since 8 + 57 + 75 + 516 + 0 + 9 + 1 = 666.

It is not a de Polignac number, because 85775516091 - 2¹ = 85775516089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85775516011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4765306441 + ... + 4765306458.

Almost surely, 2^85775516091 is an apocalyptic number.

85775516091 is a deficient number, since it is larger than the sum of its proper divisors (38122451609).

85775516091 is a wasteful number, since it uses less digits than its factorization.

85775516091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9530612905 (or 9530612902 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 54.

The spelling of 85775516091 in words is "eighty-five billion, seven hundred seventy-five million, five hundred sixteen thousand, ninety-one".