85815656 has 16 divisors (see below), whose sum is σ = 161986500. Its totient is φ = 42619264.

The previous prime is 85815637. The next prime is 85815671. The reversal of 85815656 is 65651858.

It can be written as a sum of positive squares in 2 ways, for example, as 84456100 + 1359556 = 9190^2 + 1166^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34805 + ... + 37188.

Almost surely, 2^85815656 is an apocalyptic number.

It is an amenable number.

85815656 is a deficient number, since it is larger than the sum of its proper divisors (76170844).

85815656 is a wasteful number, since it uses less digits than its factorization.

85815656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72148 (or 72144 counting only the distinct ones).

The product of its digits is 288000, while the sum is 44.

The square root of 85815656 is about 9263.6740011725. The cubic root of 85815656 is about 441.0848848415.

The spelling of 85815656 in words is "eighty-five million, eight hundred fifteen thousand, six hundred fifty-six".