55505561006173 has 2 divisors, whose sum is σ = 55505561006174. Its totient is φ = 55505561006172.

The previous prime is 55505561006107. The next prime is 55505561006179. The reversal of 55505561006173 is 37160016550555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31439491910649 + 24066069095524 = 5607093^2 + 4905718^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505561006173 - 2³⁷ = 55368122052701 is a prime.

It is a super-2 number, since 2×55505561006173² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55505561006179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752780503086 + 27752780503087.

It is an arithmetic number, because the mean of its divisors is an integer number (27752780503087).

Almost surely, 2^{55505561006173} is an apocalyptic number.

It is an amenable number.

55505561006173 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505561006173 is an equidigital number, since it uses as much as digits as its factorization.

55505561006173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2362500, while the sum is 49.

The spelling of 55505561006173 in words is "fifty-five trillion, five hundred five billion, five hundred sixty-one million, six thousand, one hundred seventy-three".