1144455661 has 2 divisors, whose sum is σ = 1144455662. Its totient is φ = 1144455660.

The previous prime is 1144455647. The next prime is 1144455677. The reversal of 1144455661 is 1665544411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015633161 + 128822500 = 31869^2 + 11350^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144455661 - 2¹⁵ = 1144422893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144455661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144450661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572227830 + 572227831.

It is an arithmetic number, because the mean of its divisors is an integer number (572227831).

Almost surely, 2^1144455661 is an apocalyptic number.

It is an amenable number.

1144455661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144455661 is an equidigital number, since it uses as much as digits as its factorization.

1144455661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 37.

The square root of 1144455661 is about 33829.8043299100. The cubic root of 1144455661 is about 1046.0031456046.

The spelling of 1144455661 in words is "one billion, one hundred forty-four million, four hundred fifty-five thousand, six hundred sixty-one".