55522444561 has 4 divisors (see below), whose sum is σ = 55532718592. Its totient is φ = 55512170532.

The previous prime is 55522444559. The next prime is 55522444573. The reversal of 55522444561 is 16544422555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16544422555 = 5 ⋅3308884511.

It is a cyclic number.

It is not a de Polignac number, because 55522444561 - 2¹ = 55522444559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55522444501) 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, 5128905 + ... + 5139718.

It is an arithmetic number, because the mean of its divisors is an integer number (13883179648).

Almost surely, 2^55522444561 is an apocalyptic number.

It is an amenable number.

55522444561 is a deficient number, since it is larger than the sum of its proper divisors (10274031).

55522444561 is a wasteful number, since it uses less digits than its factorization.

55522444561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10274030.

The product of its digits is 960000, while the sum is 43.

The spelling of 55522444561 in words is "fifty-five billion, five hundred twenty-two million, four hundred forty-four thousand, five hundred sixty-one".