5554878978 has 64 divisors (see below), whose sum is σ = 12235392000. Its totient is φ = 1667304000.

The previous prime is 5554878977. The next prime is 5554879003. The reversal of 5554878978 is 8798784555.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (5554878977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4972476 + ... + 4973592.

It is an arithmetic number, because the mean of its divisors is an integer number (191178000).

Almost surely, 2^5554878978 is an apocalyptic number.

5554878978 is an abundant number, since it is smaller than the sum of its proper divisors (6680513022).

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

5554878978 is a wasteful number, since it uses less digits than its factorization.

5554878978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783.

The product of its digits is 112896000, while the sum is 66.

The square root of 5554878978 is about 74531.0604915830. The cubic root of 5554878978 is about 1771.0257152918.

It can be divided in two parts, 555487 and 8978, that added together give a palindrome (564465).

The spelling of 5554878978 in words is "five billion, five hundred fifty-four million, eight hundred seventy-eight thousand, nine hundred seventy-eight".