85775644 has 6 divisors (see below), whose sum is σ = 150107384. Its totient is φ = 42887820.

The previous prime is 85775639. The next prime is 85775647. The reversal of 85775644 is 44657758.

It is a happy number.

It is a super-2 number, since 2×85775644² = 14714922207229472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85775594 and 85775603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85775647) by changing a digit.

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 as a sum of consecutive naturals, namely, 10721952 + ... + 10721959.

Almost surely, 2^85775644 is an apocalyptic number.

It is an amenable number.

85775644 is a deficient number, since it is larger than the sum of its proper divisors (64331740).

85775644 is a wasteful number, since it uses less digits than its factorization.

85775644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21443915 (or 21443913 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 85775644 is about 9261.5141310695. The cubic root of 85775644 is about 441.0163214702.

The spelling of 85775644 in words is "eighty-five million, seven hundred seventy-five thousand, six hundred forty-four".