1444445557 has 2 divisors, whose sum is σ = 1444445558. Its totient is φ = 1444445556.

The previous prime is 1444445533. The next prime is 1444445581. The reversal of 1444445557 is 7555444441.

It is a balanced prime because it is at equal distance from previous prime (1444445533) and next prime (1444445581).

It can be written as a sum of positive squares in only one way, i.e., 1121848036 + 322597521 = 33494^2 + 17961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1444445557 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1447445557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722222778 + 722222779.

It is an arithmetic number, because the mean of its divisors is an integer number (722222779).

Almost surely, 2^1444445557 is an apocalyptic number.

It is an amenable number.

1444445557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444445557 is an equidigital number, since it uses as much as digits as its factorization.

1444445557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896000, while the sum is 43.

The square root of 1444445557 is about 38005.8621399384. The cubic root of 1444445557 is about 1130.4041045619.

Adding to 1444445557 its reverse (7555444441), we get a palindrome (8999889998).

The spelling of 1444445557 in words is "one billion, four hundred forty-four million, four hundred forty-five thousand, five hundred fifty-seven".