755144561 has 2 divisors, whose sum is σ = 755144562. Its totient is φ = 755144560.

The previous prime is 755144557. The next prime is 755144587. The reversal of 755144561 is 165441557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 679123600 + 76020961 = 26060^2 + 8719^2 .

It is a cyclic number.

It is not a de Polignac number, because 755144561 - 2² = 755144557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (755144461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377572280 + 377572281.

It is an arithmetic number, because the mean of its divisors is an integer number (377572281).

Almost surely, 2^755144561 is an apocalyptic number.

It is an amenable number.

755144561 is a deficient number, since it is larger than the sum of its proper divisors (1).

755144561 is an equidigital number, since it uses as much as digits as its factorization.

755144561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84000, while the sum is 38.

The square root of 755144561 is about 27479.8937588922. The cubic root of 755144561 is about 910.6329617991.

The spelling of 755144561 in words is "seven hundred fifty-five million, one hundred forty-four thousand, five hundred sixty-one".