5565550878 has 48 divisors (see below), whose sum is σ = 12709773360. Its totient is φ = 1803962016.

The previous prime is 5565550871. The next prime is 5565550897. The reversal of 5565550878 is 8780555655.

It is a happy number.

5565550878 is a `hidden beast` number, since 5 + 5 + 6 + 5 + 550 + 87 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5565550871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3333828 + ... + 3335496.

It is an arithmetic number, because the mean of its divisors is an integer number (264786945).

Almost surely, 2^5565550878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5565550878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6354886680).

5565550878 is an abundant number, since it is smaller than the sum of its proper divisors (7144222482).

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

5565550878 is an equidigital number, since it uses as much as digits as its factorization.

5565550878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386 (or 1711 counting only the distinct ones).

The product of its (nonzero) digits is 8400000, while the sum is 54.

The square root of 5565550878 is about 74602.6197797370. The cubic root of 5565550878 is about 1772.1591404462.

The spelling of 5565550878 in words is "five billion, five hundred sixty-five million, five hundred fifty thousand, eight hundred seventy-eight".