610552561 has 2 divisors, whose sum is σ = 610552562. Its totient is φ = 610552560.

The previous prime is 610552559. The next prime is 610552567. The reversal of 610552561 is 165255016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558424161 + 52128400 = 23631^2 + 7220^2 .

It is a cyclic number.

It is not a de Polignac number, because 610552561 - 2¹ = 610552559 is a prime.

Together with 610552559, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (610552567) 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 as a sum of consecutive naturals, namely, 305276280 + 305276281.

It is an arithmetic number, because the mean of its divisors is an integer number (305276281).

Almost surely, 2^610552561 is an apocalyptic number.

It is an amenable number.

610552561 is a deficient number, since it is larger than the sum of its proper divisors (1).

610552561 is an equidigital number, since it uses as much as digits as its factorization.

610552561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 610552561 is about 24709.3618088367. The cubic root of 610552561 is about 848.3486096534.

The spelling of 610552561 in words is "six hundred ten million, five hundred fifty-two thousand, five hundred sixty-one".