154144561 has 2 divisors, whose sum is σ = 154144562. Its totient is φ = 154144560.

The previous prime is 154144531. The next prime is 154144579. The reversal of 154144561 is 165441451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 13366336 = 11865^2 + 3656^2 .

It is a cyclic number.

It is not a de Polignac number, because 154144561 - 2¹⁹ = 153620273 is a prime.

It is not a weakly prime, because it can be changed into another prime (154144531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77072280 + 77072281.

It is an arithmetic number, because the mean of its divisors is an integer number (77072281).

Almost surely, 2^154144561 is an apocalyptic number.

It is an amenable number.

154144561 is a deficient number, since it is larger than the sum of its proper divisors (1).

154144561 is an equidigital number, since it uses as much as digits as its factorization.

154144561 is an odious number, because the sum of its binary digits is odd.

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

The square root of 154144561 is about 12415.4968084245. The cubic root of 154144561 is about 536.1785078285.

The spelling of 154144561 in words is "one hundred fifty-four million, one hundred forty-four thousand, five hundred sixty-one".