55479838109 has 2 divisors, whose sum is σ = 55479838110. Its totient is φ = 55479838108.

The previous prime is 55479838097. The next prime is 55479838129. The reversal of 55479838109 is 90183897455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32634422500 + 22845415609 = 180650^2 + 151147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55479838109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55479838129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27739919054 + 27739919055.

It is an arithmetic number, because the mean of its divisors is an integer number (27739919055).

Almost surely, 2^55479838109 is an apocalyptic number.

It is an amenable number.

55479838109 is a deficient number, since it is larger than the sum of its proper divisors (1).

55479838109 is an equidigital number, since it uses as much as digits as its factorization.

55479838109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 55479838109 in words is "fifty-five billion, four hundred seventy-nine million, eight hundred thirty-eight thousand, one hundred nine".