551444242409 has 2 divisors, whose sum is σ = 551444242410. Its totient is φ = 551444242408.

The previous prime is 551444242403. The next prime is 551444242429. The reversal of 551444242409 is 904242444155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 361505170009 + 189939072400 = 601253^2 + 435820^2 .

It is a cyclic number.

It is not a de Polignac number, because 551444242409 - 2¹² = 551444238313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551444242409.

It is not a weakly prime, because it can be changed into another prime (551444242403) 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, 275722121204 + 275722121205.

It is an arithmetic number, because the mean of its divisors is an integer number (275722121205).

Almost surely, 2^551444242409 is an apocalyptic number.

It is an amenable number.

551444242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

551444242409 is an equidigital number, since it uses as much as digits as its factorization.

551444242409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 551444242409 in words is "five hundred fifty-one billion, four hundred forty-four million, two hundred forty-two thousand, four hundred nine".