64163644 has 24 divisors (see below), whose sum is σ = 120058848. Its totient is φ = 29898240.

The previous prime is 64163639. The next prime is 64163699. The reversal of 64163644 is 44636146.

It is a super-2 number, since 2×64163644² = 8233946422717472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2424 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (5002452).

Almost surely, 2^64163644 is an apocalyptic number.

It is an amenable number.

64163644 is a deficient number, since it is larger than the sum of its proper divisors (55895204).

64163644 is a wasteful number, since it uses less digits than its factorization.

64163644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9285 (or 9283 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

The square root of 64163644 is about 8010.2212204158. The cubic root of 64163644 is about 400.3406348374.

The spelling of 64163644 in words is "sixty-four million, one hundred sixty-three thousand, six hundred forty-four".