55126503409 has 2 divisors, whose sum is σ = 55126503410. Its totient is φ = 55126503408.

The previous prime is 55126503403. The next prime is 55126503427. The reversal of 55126503409 is 90430562155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38290662400 + 16835841009 = 195680^2 + 129753^2 .

It is a cyclic number.

It is not a de Polignac number, because 55126503409 - 2²¹ = 55124406257 is a prime.

It is not a weakly prime, because it can be changed into another prime (55126503403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27563251704 + 27563251705.

It is an arithmetic number, because the mean of its divisors is an integer number (27563251705).

Almost surely, 2^55126503409 is an apocalyptic number.

It is an amenable number.

55126503409 is a deficient number, since it is larger than the sum of its proper divisors (1).

55126503409 is an equidigital number, since it uses as much as digits as its factorization.

55126503409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 55126503409 in words is "fifty-five billion, one hundred twenty-six million, five hundred three thousand, four hundred nine".