5205478280178 has 128 divisors (see below), whose sum is σ = 12114242841600. Its totient is φ = 1474579814400.

The previous prime is 5205478280173. The next prime is 5205478280243. The reversal of 5205478280178 is 8710828745025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (5205478280173) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54751050 + ... + 54846042.

It is an arithmetic number, because the mean of its divisors is an integer number (94642522200).

Almost surely, 2^{5205478280178} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5205478280178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6057121420800).

5205478280178 is an abundant number, since it is smaller than the sum of its proper divisors (6908764561422).

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

5205478280178 is a wasteful number, since it uses less digits than its factorization.

5205478280178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95608.

The product of its (nonzero) digits is 10035200, while the sum is 57.

The spelling of 5205478280178 in words is "five trillion, two hundred five billion, four hundred seventy-eight million, two hundred eighty thousand, one hundred seventy-eight".