2544025621 has 4 divisors (see below), whose sum is σ = 2544695244. Its totient is φ = 2543356000.

The previous prime is 2544025619. The next prime is 2544025657. The reversal of 2544025621 is 1265204452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1366780900 + 1177244721 = 36970^2 + 34311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2544025621 - 2¹ = 2544025619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2544025681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329080 + ... + 336721.

It is an arithmetic number, because the mean of its divisors is an integer number (636173811).

Almost surely, 2^2544025621 is an apocalyptic number.

It is an amenable number.

2544025621 is a deficient number, since it is larger than the sum of its proper divisors (669623).

2544025621 is an equidigital number, since it uses as much as digits as its factorization.

2544025621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669622.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 2544025621 is about 50438.3348357180. The cubic root of 2544025621 is about 1365.1294220874.

The spelling of 2544025621 in words is "two billion, five hundred forty-four million, twenty-five thousand, six hundred twenty-one".