55491241109 has 4 divisors (see below), whose sum is σ = 55503530604. Its totient is φ = 55478951616.

The previous prime is 55491241081. The next prime is 55491241121. The reversal of 55491241109 is 90114219455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19683248209 + 35807992900 = 140297^2 + 189230^2 .

It is a cyclic number.

It is not a de Polignac number, because 55491241109 - 2¹⁶ = 55491175573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55491241199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6137972 + ... + 6147005.

It is an arithmetic number, because the mean of its divisors is an integer number (13875882651).

Almost surely, 2^55491241109 is an apocalyptic number.

It is an amenable number.

55491241109 is a deficient number, since it is larger than the sum of its proper divisors (12289495).

55491241109 is a wasteful number, since it uses less digits than its factorization.

55491241109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12289494.

The product of its (nonzero) digits is 64800, while the sum is 41.

The spelling of 55491241109 in words is "fifty-five billion, four hundred ninety-one million, two hundred forty-one thousand, one hundred nine".