55255566728 has 8 divisors (see below), whose sum is σ = 103604187630. Its totient is φ = 27627783360.

The previous prime is 55255566659. The next prime is 55255566761. The reversal of 55255566728 is 82766555255.

55255566728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 33043241284 + 22212325444 = 181778^2 + 149038^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3453472913 + ... + 3453472928.

Almost surely, 2^55255566728 is an apocalyptic number.

It is an amenable number.

55255566728 is a deficient number, since it is larger than the sum of its proper divisors (48348620902).

55255566728 is a wasteful number, since it uses less digits than its factorization.

55255566728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906945847 (or 6906945843 counting only the distinct ones).

The product of its digits is 25200000, while the sum is 56.

The spelling of 55255566728 in words is "fifty-five billion, two hundred fifty-five million, five hundred sixty-six thousand, seven hundred twenty-eight".