55178288947680 has 96 divisors (see below), whose sum is σ = 173812686534144. Its totient is φ = 14714119266816.

The previous prime is 55178288947679. The next prime is 55178288947687. The reversal of 55178288947680 is 8674988287155.

55178288947680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 7428209²-1.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 55178288947596 and 55178288947605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55178288947687) 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 15 ways as a sum of consecutive naturals, for example, 118619229 + ... + 119083491.

It is an arithmetic number, because the mean of its divisors is an integer number (1810548818064).

Almost surely, 2^{55178288947680} is an apocalyptic number.

It is an amenable number.

55178288947680 is an abundant number, since it is smaller than the sum of its proper divisors (118634397586464).

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

55178288947680 is a wasteful number, since it uses less digits than its factorization.

55178288947680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711888 (or 711880 counting only the distinct ones).

The product of its (nonzero) digits is 2167603200, while the sum is 78.

The spelling of 55178288947680 in words is "fifty-five trillion, one hundred seventy-eight billion, two hundred eighty-eight million, nine hundred forty-seven thousand, six hundred eighty".