1605441451 has 2 divisors, whose sum is σ = 1605441452. Its totient is φ = 1605441450.

The previous prime is 1605441403. The next prime is 1605441491. The reversal of 1605441451 is 1541445061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1605441451 - 2¹¹ = 1605439403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1605441491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802720725 + 802720726.

It is an arithmetic number, because the mean of its divisors is an integer number (802720726).

Almost surely, 2^1605441451 is an apocalyptic number.

1605441451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605441451 is an equidigital number, since it uses as much as digits as its factorization.

1605441451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 1605441451 is about 40067.9604047923. The cubic root of 1605441451 is about 1170.9315032923.

The spelling of 1605441451 in words is "one billion, six hundred five million, four hundred forty-one thousand, four hundred fifty-one".