55486628209 has 4 divisors (see below), whose sum is σ = 55490252004. Its totient is φ = 55483004416.

The previous prime is 55486628191. The next prime is 55486628221. The reversal of 55486628209 is 90282668455.

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 49604198400 + 5882429809 = 222720^2 + 76697^2 .

It is a cyclic number.

It is not a de Polignac number, because 55486628209 - 2¹⁷ = 55486497137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55486628209.

It is not an unprimeable number, because it can be changed into a prime (55486628809) 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, 1788832 + ... + 1819585.

It is an arithmetic number, because the mean of its divisors is an integer number (13872563001).

Almost surely, 2^55486628209 is an apocalyptic number.

It is an amenable number.

55486628209 is a deficient number, since it is larger than the sum of its proper divisors (3623795).

55486628209 is a wasteful number, since it uses less digits than its factorization.

55486628209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623794.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 55486628209 in words is "fifty-five billion, four hundred eighty-six million, six hundred twenty-eight thousand, two hundred nine".