644341411 has 8 divisors (see below), whose sum is σ = 741333600. Its totient is φ = 548585088.

The previous prime is 644341409. The next prime is 644341427. The reversal of 644341411 is 114143446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 644341411 - 2¹ = 644341409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 644341411.

It is not an unprimeable number, because it can be changed into a prime (644347411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307846 + ... + 309931.

It is an arithmetic number, because the mean of its divisors is an integer number (92666700).

Almost surely, 2^644341411 is an apocalyptic number.

644341411 is a deficient number, since it is larger than the sum of its proper divisors (96992189).

644341411 is a wasteful number, since it uses less digits than its factorization.

644341411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617933.

The product of its digits is 4608, while the sum is 28.

The square root of 644341411 is about 25383.8809286523. The cubic root of 644341411 is about 863.7180878060.

Adding to 644341411 its reverse (114143446), we get a palindrome (758484857).

The spelling of 644341411 in words is "six hundred forty-four million, three hundred forty-one thousand, four hundred eleven".