5550961878 has 144 divisors (see below), whose sum is σ = 15158820768. Its totient is φ = 1437004800.

The previous prime is 5550961849. The next prime is 5550961909. The reversal of 5550961878 is 8781690555.

5550961878 is a `hidden beast` number, since 5 + 5 + 509 + 61 + 8 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8247750 + ... + 8248422.

Almost surely, 2^5550961878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5550961878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7579410384).

5550961878 is an abundant number, since it is smaller than the sum of its proper divisors (9607858890).

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

5550961878 is a wasteful number, since it uses less digits than its factorization.

5550961878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251 (or 1237 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 54.

The square root of 5550961878 is about 74504.7775515101. Note that the first 3 decimals coincide. The cubic root of 5550961878 is about 1770.6093296161.

The spelling of 5550961878 in words is "five billion, five hundred fifty million, nine hundred sixty-one thousand, eight hundred seventy-eight".