55057566320 has 20 divisors (see below), whose sum is σ = 128008841880. Its totient is φ = 22023026496.

The previous prime is 55057566287. The next prime is 55057566367. The reversal of 55057566320 is 2366575055.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 344109710 + ... + 344109869.

It is an arithmetic number, because the mean of its divisors is an integer number (6400442094).

Almost surely, 2^55057566320 is an apocalyptic number.

It is an amenable number.

55057566320 is an abundant number, since it is smaller than the sum of its proper divisors (72951275560).

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

55057566320 is a wasteful number, since it uses less digits than its factorization.

55057566320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688219592 (or 688219586 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 44.

The spelling of 55057566320 in words is "fifty-five billion, fifty-seven million, five hundred sixty-six thousand, three hundred twenty".