1440136553 has 2 divisors, whose sum is σ = 1440136554. Its totient is φ = 1440136552.

The previous prime is 1440136543. The next prime is 1440136567. The reversal of 1440136553 is 3556310441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440050704 + 85849 = 37948^2 + 293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1440136553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1440136543) 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, 720068276 + 720068277.

It is an arithmetic number, because the mean of its divisors is an integer number (720068277).

Almost surely, 2^1440136553 is an apocalyptic number.

It is an amenable number.

1440136553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440136553 is an equidigital number, since it uses as much as digits as its factorization.

1440136553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 1440136553 is about 37949.1311231232. The cubic root of 1440136553 is about 1129.2789283326.

Adding to 1440136553 its reverse (3556310441), we get a palindrome (4996446994).

The spelling of 1440136553 in words is "one billion, four hundred forty million, one hundred thirty-six thousand, five hundred fifty-three".