55278169589760 has 768 divisors, whose sum is σ = 199928881152000. Its totient is φ = 12944643194880.

The previous prime is 55278169589723. The next prime is 55278169589777. The reversal of 55278169589760 is 6798596187255.

It is a tau number, because it is divible by the number of its divisors (768).

It is a Harshad number since it is a multiple of its sum of digits (78).

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 730391601 + ... + 730467279.

It is an arithmetic number, because the mean of its divisors is an integer number (260324064000).

Almost surely, 2^{55278169589760} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55278169589760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99964440576000).

55278169589760 is an abundant number, since it is smaller than the sum of its proper divisors (144650711562240).

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

55278169589760 is a wasteful number, since it uses less digits than its factorization.

55278169589760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75812 (or 75792 counting only the distinct ones).

The product of its (nonzero) digits is 2286144000, while the sum is 78.

The spelling of 55278169589760 in words is "fifty-five trillion, two hundred seventy-eight billion, one hundred sixty-nine million, five hundred eighty-nine thousand, seven hundred sixty".