64244845 has 16 divisors (see below), whose sum is σ = 88369920. Its totient is φ = 43922304.

The previous prime is 64244837. The next prime is 64244849. The reversal of 64244845 is 54844246.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 64244845 - 2³ = 64244837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64244849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10009 + ... + 15121.

It is an arithmetic number, because the mean of its divisors is an integer number (5523120).

Almost surely, 2^64244845 is an apocalyptic number.

It is an amenable number.

64244845 is a deficient number, since it is larger than the sum of its proper divisors (24125075).

64244845 is a wasteful number, since it uses less digits than its factorization.

64244845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5484.

The product of its digits is 122880, while the sum is 37.

The square root of 64244845 is about 8015.2882044253. The cubic root of 64244845 is about 400.5094446399.

The spelling of 64244845 in words is "sixty-four million, two hundred forty-four thousand, eight hundred forty-five".