45505561 has 2 divisors, whose sum is σ = 45505562. Its totient is φ = 45505560.

The previous prime is 45505459. The next prime is 45505571. The reversal of 45505561 is 16550554.

45505561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45481536 + 24025 = 6744^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 45505561 - 2¹⁹ = 44981273 is a prime.

It is not a weakly prime, because it can be changed into another prime (45505571) 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, 22752780 + 22752781.

It is an arithmetic number, because the mean of its divisors is an integer number (22752781).

Almost surely, 2^45505561 is an apocalyptic number.

It is an amenable number.

45505561 is a deficient number, since it is larger than the sum of its proper divisors (1).

45505561 is an equidigital number, since it uses as much as digits as its factorization.

45505561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 45505561 is about 6745.7809777668. The cubic root of 45505561 is about 357.0163927328.

The spelling of 45505561 in words is "forty-five million, five hundred five thousand, five hundred sixty-one".