55553720166850 has 24 divisors (see below), whose sum is σ = 103330336751028. Its totient is φ = 22221398337600.

The previous prime is 55553720166811. The next prime is 55553720166859. The reversal of 55553720166850 is 5866102735555.

It can be written as a sum of positive squares in 6 ways, for example, as 5841081749889 + 49712638416961 = 2416833^2 + 7050719^2 .

It is not an unprimeable number, because it can be changed into a prime (55553720166859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11042160 + ... + 15265540.

Almost surely, 2^{55553720166850} is an apocalyptic number.

55553720166850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55553720166850 is a deficient number, since it is larger than the sum of its proper divisors (47776616584178).

55553720166850 is a wasteful number, since it uses less digits than its factorization.

55553720166850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4486470 (or 4486465 counting only the distinct ones).

The product of its (nonzero) digits is 37800000, while the sum is 58.

The spelling of 55553720166850 in words is "fifty-five trillion, five hundred fifty-three billion, seven hundred twenty million, one hundred sixty-six thousand, eight hundred fifty".