550878978 has 16 divisors (see below), whose sum is σ = 1186508736. Its totient is φ = 169501200.

The previous prime is 550878971. The next prime is 550879001. The reversal of 550878978 is 879878055.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (550878971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3531198 + ... + 3531353.

It is an arithmetic number, because the mean of its divisors is an integer number (74156796).

Almost surely, 2^550878978 is an apocalyptic number.

550878978 is an abundant number, since it is smaller than the sum of its proper divisors (635629758).

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

550878978 is a wasteful number, since it uses less digits than its factorization.

550878978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7062569.

The product of its (nonzero) digits is 5644800, while the sum is 57.

The square root of 550878978 is about 23470.8111917761. The cubic root of 550878978 is about 819.7575021582.

The spelling of 550878978 in words is "five hundred fifty million, eight hundred seventy-eight thousand, nine hundred seventy-eight".