55563331728 has 40 divisors (see below), whose sum is σ = 143741147200. Its totient is φ = 18494976384.

The previous prime is 55563331721. The next prime is 55563331729. The reversal of 55563331728 is 82713336555.

55563331728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (55563331721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782308 + ... + 850371.

It is an arithmetic number, because the mean of its divisors is an integer number (3593528680).

Almost surely, 2^55563331728 is an apocalyptic number.

It is an amenable number.

55563331728 is an abundant number, since it is smaller than the sum of its proper divisors (88177815472).

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

55563331728 is a wasteful number, since it uses less digits than its factorization.

55563331728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633399 (or 1633393 counting only the distinct ones).

The product of its digits is 2268000, while the sum is 48.

The spelling of 55563331728 in words is "fifty-five billion, five hundred sixty-three million, three hundred thirty-one thousand, seven hundred twenty-eight".