85042427838 has 16 divisors (see below), whose sum is σ = 172967650560. Its totient is φ = 27867010136.

The previous prime is 85042427773. The next prime is 85042427839. The reversal of 85042427838 is 83872424058.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85042427839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120116070 + ... + 120116777.

It is an arithmetic number, because the mean of its divisors is an integer number (10810478160).

Almost surely, 2^85042427838 is an apocalyptic number.

85042427838 is an abundant number, since it is smaller than the sum of its proper divisors (87925222722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85042427838 is a wasteful number, since it uses less digits than its factorization.

85042427838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240232911.

The product of its (nonzero) digits is 3440640, while the sum is 51.

It can be divided in two parts, 8504 and 2427838, that added together give a palindrome (2436342).

The spelling of 85042427838 in words is "eighty-five billion, forty-two million, four hundred twenty-seven thousand, eight hundred thirty-eight".