55009534878 has 24 divisors (see below), whose sum is σ = 120966243528. Its totient is φ = 18062831952.

The previous prime is 55009534873. The next prime is 55009534889. The reversal of 55009534878 is 87843590055.

55009534878 is a `hidden beast` number, since 5 + 500 + 9 + 53 + 4 + 87 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55009534873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22805401 + ... + 22807812.

It is an arithmetic number, because the mean of its divisors is an integer number (5040260147).

Almost surely, 2^55009534878 is an apocalyptic number.

55009534878 is an abundant number, since it is smaller than the sum of its proper divisors (65956708650).

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

55009534878 is a wasteful number, since it uses less digits than its factorization.

55009534878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45613288 (or 45613285 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 55009534878 in words is "fifty-five billion, nine million, five hundred thirty-four thousand, eight hundred seventy-eight".