55533444520 has 32 divisors (see below), whose sum is σ = 127307806920. Its totient is φ = 21794256640.

The previous prime is 55533444517. The next prime is 55533444529. The reversal of 55533444520 is 2544433555.

55533444520 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 4 ways, for example, as 55532807716 + 636804 = 235654^2 + 798^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (55533444529) 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, 13095391 + ... + 13099630.

Almost surely, 2^55533444520 is an apocalyptic number.

It is an amenable number.

55533444520 is an abundant number, since it is smaller than the sum of its proper divisors (71774362400).

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

55533444520 is a wasteful number, since it uses less digits than its factorization.

55533444520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26195085 (or 26195081 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 40.

The spelling of 55533444520 in words is "fifty-five billion, five hundred thirty-three million, four hundred forty-four thousand, five hundred twenty".