55400054309 has 2 divisors, whose sum is σ = 55400054310. Its totient is φ = 55400054308.

The previous prime is 55400054267. The next prime is 55400054363. The reversal of 55400054309 is 90345000455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35362802500 + 20037251809 = 188050^2 + 141553^2 .

It is a cyclic number.

It is not a de Polignac number, because 55400054309 - 2²⁰ = 55399005733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55400054389) 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, 27700027154 + 27700027155.

It is an arithmetic number, because the mean of its divisors is an integer number (27700027155).

Almost surely, 2^55400054309 is an apocalyptic number.

It is an amenable number.

55400054309 is a deficient number, since it is larger than the sum of its proper divisors (1).

55400054309 is an equidigital number, since it uses as much as digits as its factorization.

55400054309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 55400054309 in words is "fifty-five billion, four hundred million, fifty-four thousand, three hundred nine".