550956978 has 160 divisors (see below), whose sum is σ = 1536796800. Its totient is φ = 144944640.

The previous prime is 550956977. The next prime is 550957007. The reversal of 550956978 is 879659055.

It is a happy number.

550956978 is a `hidden beast` number, since 5 + 5 + 0 + 9 + 569 + 78 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (550956977) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 393123 + ... + 394521.

It is an arithmetic number, because the mean of its divisors is an integer number (9604980).

Almost surely, 2^550956978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 550956978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768398400).

550956978 is an abundant number, since it is smaller than the sum of its proper divisors (985839822).

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

550956978 is a wasteful number, since it uses less digits than its factorization.

550956978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454 (or 1445 counting only the distinct ones).

The product of its (nonzero) digits is 3402000, while the sum is 54.

The square root of 550956978 is about 23472.4727713124. The cubic root of 550956978 is about 819.7961906724.

The spelling of 550956978 in words is "five hundred fifty million, nine hundred fifty-six thousand, nine hundred seventy-eight".