6448144565 has 16 divisors (see below), whose sum is σ = 7892235648. Its totient is φ = 5055750336.

The previous prime is 6448144543. The next prime is 6448144567. The reversal of 6448144565 is 5654418446.

6448144565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6448144565 - 2¹⁸ = 6447882421 is a prime.

It is a super-2 number, since 2×6448144565² = 83157136662278078450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6448144567) 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, 243674 + ... + 268836.

It is an arithmetic number, because the mean of its divisors is an integer number (493264728).

Almost surely, 2^6448144565 is an apocalyptic number.

It is an amenable number.

6448144565 is a deficient number, since it is larger than the sum of its proper divisors (1444091083).

6448144565 is a wasteful number, since it uses less digits than its factorization.

6448144565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26188.

The product of its digits is 1843200, while the sum is 47.

The square root of 6448144565 is about 80300.3397564419. The cubic root of 6448144565 is about 1861.2794762510.

The spelling of 6448144565 in words is "six billion, four hundred forty-eight million, one hundred forty-four thousand, five hundred sixty-five".