2545560641 has 8 divisors (see below), whose sum is σ = 2757596520. Its totient is φ = 2349746256.

The previous prime is 2545560623. The next prime is 2545560653. The reversal of 2545560641 is 1460655452.

It can be written as a sum of positive squares in 4 ways, for example, as 260338225 + 2285222416 = 16135^2 + 47804^2 .

It is not a de Polignac number, because 2545560641 - 2¹⁴ = 2545544257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2545560595 and 2545560604.

It is not an unprimeable number, because it can be changed into a prime (2545560601) 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, 577130 + ... + 581523.

It is an arithmetic number, because the mean of its divisors is an integer number (344699565).

Almost surely, 2^2545560641 is an apocalyptic number.

It is an amenable number.

2545560641 is a deficient number, since it is larger than the sum of its proper divisors (212035879).

2545560641 is an equidigital number, since it uses as much as digits as its factorization.

2545560641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158692 (or 1158666 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 2545560641 is about 50453.5493399622. The cubic root of 2545560641 is about 1365.4039318547.

The spelling of 2545560641 in words is "two billion, five hundred forty-five million, five hundred sixty thousand, six hundred forty-one".