85438507711 has 4 divisors (see below), whose sum is σ = 85778900424. Its totient is φ = 85098115000.

The previous prime is 85438507699. The next prime is 85438507729. The reversal of 85438507711 is 11770583458.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11770583458 = 2 ⋅5885291729.

It is a cyclic number.

It is not a de Polignac number, because 85438507711 - 2⁹ = 85438507199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85438507771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170195980 + ... + 170196481.

It is an arithmetic number, because the mean of its divisors is an integer number (21444725106).

Almost surely, 2^85438507711 is an apocalyptic number.

85438507711 is a deficient number, since it is larger than the sum of its proper divisors (340392713).

85438507711 is a wasteful number, since it uses less digits than its factorization.

85438507711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340392712.

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 85438507711 in words is "eighty-five billion, four hundred thirty-eight million, five hundred seven thousand, seven hundred eleven".