55021307660 has 48 divisors (see below), whose sum is σ = 127465138080. Its totient is φ = 19782935040.

The previous prime is 55021307657. The next prime is 55021307701. The reversal of 55021307660 is 6670312055.

It is a self number, because there is not a number n which added to its sum of digits gives 55021307660.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1385459 + ... + 1424618.

It is an arithmetic number, because the mean of its divisors is an integer number (2655523710).

Almost surely, 2^55021307660 is an apocalyptic number.

It is an amenable number.

55021307660 is an abundant number, since it is smaller than the sum of its proper divisors (72443830420).

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

55021307660 is a wasteful number, since it uses less digits than its factorization.

55021307660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810186 (or 2810184 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 55021307660 in words is "fifty-five billion, twenty-one million, three hundred seven thousand, six hundred sixty".