55502778050000 has 60 divisors (see below), whose sum is σ = 134412187780332. Its totient is φ = 22201111200000.

The previous prime is 55502778049981. The next prime is 55502778050017. The reversal of 55502778050000 is 5087720555.

It can be written as a sum of positive squares in 6 ways, for example, as 29911361080384 + 25591416969616 = 5469128^2 + 5058796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 554977781 + ... + 555077780.

Almost surely, 2^{55502778050000} is an apocalyptic number.

55502778050000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55502778050000 is an abundant number, since it is smaller than the sum of its proper divisors (78909409730332).

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

55502778050000 is an equidigital number, since it uses as much as digits as its factorization.

55502778050000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110055594 (or 1110055568 counting only the distinct ones).

The product of its (nonzero) digits is 490000, while the sum is 44.

The spelling of 55502778050000 in words is "fifty-five trillion, five hundred two billion, seven hundred seventy-eight million, fifty thousand".