55561602173 has 32 divisors (see below), whose sum is σ = 70023923712. Its totient is φ = 42825384000.

The previous prime is 55561602137. The next prime is 55561602209. The reversal of 55561602173 is 37120616555.

It is an interprime number because it is at equal distance from previous prime (55561602137) and next prime (55561602209).

It is not a de Polignac number, because 55561602173 - 2¹² = 55561598077 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 55561602173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561602133) 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 31 ways as a sum of consecutive naturals, for example, 10130690 + ... + 10136172.

It is an arithmetic number, because the mean of its divisors is an integer number (2188247616).

Almost surely, 2^55561602173 is an apocalyptic number.

It is an amenable number.

55561602173 is a deficient number, since it is larger than the sum of its proper divisors (14462321539).

55561602173 is a wasteful number, since it uses less digits than its factorization.

55561602173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6905.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 55561602173 in words is "fifty-five billion, five hundred sixty-one million, six hundred two thousand, one hundred seventy-three".