55521166176 has 720 divisors, whose sum is σ = 198220442112. Its totient is φ = 15190156800.

The previous prime is 55521166153. The next prime is 55521166177. The reversal of 55521166176 is 67166112555.

It is a happy number.

55521166176 is a `hidden beast` number, since 5 + 5 + 5 + 21 + 1 + 6 + 617 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521166177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 423825631 + ... + 423825761.

Almost surely, 2^55521166176 is an apocalyptic number.

55521166176 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55521166176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99110221056).

55521166176 is an abundant number, since it is smaller than the sum of its proper divisors (142699275936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55521166176 is a wasteful number, since it uses less digits than its factorization.

55521166176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 261 counting only the distinct ones).

The product of its digits is 378000, while the sum is 45.

The spelling of 55521166176 in words is "fifty-five billion, five hundred twenty-one million, one hundred sixty-six thousand, one hundred seventy-six".