2544220065 has 32 divisors (see below), whose sum is σ = 4222144512. Its totient is φ = 1306872000.

The previous prime is 2544220057. The next prime is 2544220097. The reversal of 2544220065 is 5600224452.

It is a happy number.

It is not a de Polignac number, because 2544220065 - 2³ = 2544220057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85150 + ... + 111080.

It is an arithmetic number, because the mean of its divisors is an integer number (131942016).

Almost surely, 2^2544220065 is an apocalyptic number.

It is an amenable number.

2544220065 is a deficient number, since it is larger than the sum of its proper divisors (1677924447).

2544220065 is a wasteful number, since it uses less digits than its factorization.

2544220065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26181.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2544220065 is about 50440.2623407135. The cubic root of 2544220065 is about 1365.1642008858.

The spelling of 2544220065 in words is "two billion, five hundred forty-four million, two hundred twenty thousand, sixty-five".