85039061791 has 4 divisors (see below), whose sum is σ = 85040613000. Its totient is φ = 85037510584.

The previous prime is 85039061761. The next prime is 85039061803. The reversal of 85039061791 is 19716093058.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19716093058 = 2 ⋅9858046529.

It is a cyclic number.

It is not a de Polignac number, because 85039061791 - 2²³ = 85030673183 is a prime.

It is a super-2 number, since 2×85039061791² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85039061761) 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, 690241 + ... + 804058.

It is an arithmetic number, because the mean of its divisors is an integer number (21260153250).

Almost surely, 2^85039061791 is an apocalyptic number.

85039061791 is a deficient number, since it is larger than the sum of its proper divisors (1551209).

85039061791 is a wasteful number, since it uses less digits than its factorization.

85039061791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551208.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 85039061791 in words is "eighty-five billion, thirty-nine million, sixty-one thousand, seven hundred ninety-one".