85511939005 has 4 divisors (see below), whose sum is σ = 102614326812. Its totient is φ = 68409551200.

The previous prime is 85511938991. The next prime is 85511939053. The reversal of 85511939005 is 50093911558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50093911558 = 2 ⋅25046955779.

It can be written as a sum of positive squares in 2 ways, for example, as 24464400921 + 61047538084 = 156411^2 + 247078^2 .

It is not a de Polignac number, because 85511939005 - 2¹³ = 85511930813 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, 8551193896 + ... + 8551193905.

It is an arithmetic number, because the mean of its divisors is an integer number (25653581703).

Almost surely, 2^85511939005 is an apocalyptic number.

It is an amenable number.

85511939005 is a deficient number, since it is larger than the sum of its proper divisors (17102387807).

85511939005 is a wasteful number, since it uses less digits than its factorization.

85511939005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17102387806.

The product of its (nonzero) digits is 243000, while the sum is 46.

The spelling of 85511939005 in words is "eighty-five billion, five hundred eleven million, nine hundred thirty-nine thousand, five".