55355783280 has 80 divisors (see below), whose sum is σ = 196117638144. Its totient is φ = 12652750080.

The previous prime is 55355783191. The next prime is 55355783297. The reversal of 55355783280 is 8238755355.

55355783280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16473256 + ... + 16476615.

Almost surely, 2^55355783280 is an apocalyptic number.

It is an amenable number.

55355783280 is an abundant number, since it is smaller than the sum of its proper divisors (140761854864).

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

55355783280 is a wasteful number, since it uses less digits than its factorization.

55355783280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32949894 (or 32949888 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 51.

The spelling of 55355783280 in words is "fifty-five billion, three hundred fifty-five million, seven hundred eighty-three thousand, two hundred eighty".