85111912 has 8 divisors (see below), whose sum is σ = 159584850. Its totient is φ = 42555952.

The previous prime is 85111907. The next prime is 85111919. The reversal of 85111912 is 21911158.

It can be written as a sum of positive squares in only one way, i.e., 84382596 + 729316 = 9186^2 + 854^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (85111919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5319487 + ... + 5319502.

Almost surely, 2^85111912 is an apocalyptic number.

It is an amenable number.

85111912 is a deficient number, since it is larger than the sum of its proper divisors (74472938).

85111912 is a wasteful number, since it uses less digits than its factorization.

85111912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638995 (or 10638991 counting only the distinct ones).

The product of its digits is 720, while the sum is 28.

The square root of 85111912 is about 9225.6117412343. The cubic root of 85111912 is about 439.8758465140.

The spelling of 85111912 in words is "eighty-five million, one hundred eleven thousand, nine hundred twelve".