2561652449 has 2 divisors, whose sum is σ = 2561652450. Its totient is φ = 2561652448.

The previous prime is 2561652437. The next prime is 2561652461. The reversal of 2561652449 is 9442561652.

It is a balanced prime because it is at equal distance from previous prime (2561652437) and next prime (2561652461).

It can be written as a sum of positive squares in only one way, i.e., 2486518225 + 75134224 = 49865^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 2561652449 - 2¹⁶ = 2561586913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2561652749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280826224 + 1280826225.

It is an arithmetic number, because the mean of its divisors is an integer number (1280826225).

Almost surely, 2^2561652449 is an apocalyptic number.

It is an amenable number.

2561652449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561652449 is an equidigital number, since it uses as much as digits as its factorization.

2561652449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 44.

The square root of 2561652449 is about 50612.7696238805. The cubic root of 2561652449 is about 1368.2750323713.

The spelling of 2561652449 in words is "two billion, five hundred sixty-one million, six hundred fifty-two thousand, four hundred forty-nine".