55561049845 has 16 divisors (see below), whose sum is σ = 76203302400. Its totient is φ = 38096360064.

The previous prime is 55561049813. The next prime is 55561049849. The reversal of 55561049845 is 54894016555.

It is not a de Polignac number, because 55561049845 - 2⁵ = 55561049813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55561049792 and 55561049801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561049849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549556 + ... + 642754.

It is an arithmetic number, because the mean of its divisors is an integer number (4762706400).

Almost surely, 2^55561049845 is an apocalyptic number.

It is an amenable number.

55561049845 is a deficient number, since it is larger than the sum of its proper divisors (20642252555).

55561049845 is a wasteful number, since it uses less digits than its factorization.

55561049845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110244.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 55561049845 in words is "fifty-five billion, five hundred sixty-one million, forty-nine thousand, eight hundred forty-five".