55065958609 has 4 divisors (see below), whose sum is σ = 55066529700. Its totient is φ = 55065387520.

The previous prime is 55065958583. The next prime is 55065958639. The reversal of 55065958609 is 90685956055.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90685956055 = 5 ⋅18137191211.

It can be written as a sum of positive squares in 2 ways, for example, as 21639881025 + 33426077584 = 147105^2 + 182828^2 .

It is a cyclic number.

It is not a de Polignac number, because 55065958609 - 2¹³ = 55065950417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55065958639) 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 in 3 ways as a sum of consecutive naturals, for example, 101272 + ... + 346969.

It is an arithmetic number, because the mean of its divisors is an integer number (13766632425).

Almost surely, 2^55065958609 is an apocalyptic number.

It is an amenable number.

55065958609 is a deficient number, since it is larger than the sum of its proper divisors (571091).

55065958609 is a wasteful number, since it uses less digits than its factorization.

55065958609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571090.

The product of its (nonzero) digits is 14580000, while the sum is 58.

The spelling of 55065958609 in words is "fifty-five billion, sixty-five million, nine hundred fifty-eight thousand, six hundred nine".