55661505044 has 24 divisors (see below), whose sum is σ = 101272754688. Its totient is φ = 26746695360.

The previous prime is 55661505023. The next prime is 55661505049. The reversal of 55661505044 is 44050516655.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a junction number, because it is equal to n+sod(n) for n = 55661504992 and 55661505010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55661505049) 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 7 ways as a sum of consecutive naturals, for example, 2521844 + ... + 2543819.

It is an arithmetic number, because the mean of its divisors is an integer number (4219698112).

Almost surely, 2^55661505044 is an apocalyptic number.

It is an amenable number.

55661505044 is a deficient number, since it is larger than the sum of its proper divisors (45611249644).

55661505044 is a wasteful number, since it uses less digits than its factorization.

55661505044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065775 (or 5065773 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 55661505044 in words is "fifty-five billion, six hundred sixty-one million, five hundred five thousand, forty-four".