2561053549 has 2 divisors, whose sum is σ = 2561053550. Its totient is φ = 2561053548.

The previous prime is 2561053541. The next prime is 2561053559. The reversal of 2561053549 is 9453501652.

2561053549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1756196649 + 804856900 = 41907^2 + 28370^2 .

It is a cyclic number.

It is not a de Polignac number, because 2561053549 - 2³ = 2561053541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561053541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280526774 + 1280526775.

It is an arithmetic number, because the mean of its divisors is an integer number (1280526775).

Almost surely, 2^2561053549 is an apocalyptic number.

It is an amenable number.

2561053549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561053549 is an equidigital number, since it uses as much as digits as its factorization.

2561053549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 2561053549 is about 50606.8527869497. The cubic root of 2561053549 is about 1368.1683923797.

The spelling of 2561053549 in words is "two billion, five hundred sixty-one million, fifty-three thousand, five hundred forty-nine".