55505005020 has 36 divisors (see below), whose sum is σ = 168365182440. Its totient is φ = 14801334624.

The previous prime is 55505005019. The next prime is 55505005067. The reversal of 55505005020 is 2050050555.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154180390 + ... + 154180749.

Almost surely, 2^55505005020 is an apocalyptic number.

It is an amenable number.

55505005020 is an abundant number, since it is smaller than the sum of its proper divisors (112860177420).

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

55505005020 is a wasteful number, since it uses less digits than its factorization.

55505005020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308361154 (or 308361149 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

Adding to 55505005020 its reverse (2050050555), we get a palindrome (57555055575).

The spelling of 55505005020 in words is "fifty-five billion, five hundred five million, five thousand, twenty".