65631444 has 12 divisors (see below), whose sum is σ = 153140064. Its totient is φ = 21877144.

The previous prime is 65631439. The next prime is 65631463. The reversal of 65631444 is 44413656.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734632 + ... + 2734655.

It is an arithmetic number, because the mean of its divisors is an integer number (12761672).

Almost surely, 2^65631444 is an apocalyptic number.

It is an amenable number.

65631444 is an abundant number, since it is smaller than the sum of its proper divisors (87508620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65631444 is a wasteful number, since it uses less digits than its factorization.

65631444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469294 (or 5469292 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 65631444 is about 8101.3235955614. The cubic root of 65631444 is about 403.3703635301.

The spelling of 65631444 in words is "sixty-five million, six hundred thirty-one thousand, four hundred forty-four".