4144563621 has 24 divisors (see below), whose sum is σ = 6707342304. Its totient is φ = 2443966560.

The previous prime is 4144563617. The next prime is 4144563641. The reversal of 4144563621 is 1263654414.

4144563621 is a `hidden beast` number, since 4 + 14 + 4 + 5 + 636 + 2 + 1 = 666.

It is not a de Polignac number, because 4144563621 - 2² = 4144563617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4144563641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 562071 + ... + 569396.

It is an arithmetic number, because the mean of its divisors is an integer number (279472596).

Almost surely, 2^4144563621 is an apocalyptic number.

It is an amenable number.

4144563621 is a deficient number, since it is larger than the sum of its proper divisors (2562778683).

4144563621 is a wasteful number, since it uses less digits than its factorization.

4144563621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131521 (or 1131518 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 4144563621 is about 64378.2853219935. The cubic root of 4144563621 is about 1606.2985606984.

It can be divided in two parts, 4144 and 563621, that added together give a palindrome (567765).

The spelling of 4144563621 in words is "four billion, one hundred forty-four million, five hundred sixty-three thousand, six hundred twenty-one".