55503838565 has 32 divisors (see below), whose sum is σ = 79166561280. Its totient is φ = 36562316544.

The previous prime is 55503838547. The next prime is 55503838571. The reversal of 55503838565 is 56583830555.

It is a cyclic number.

It is not a de Polignac number, because 55503838565 - 2¹² = 55503834469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168962 + ... + 373571.

It is an arithmetic number, because the mean of its divisors is an integer number (2473955040).

Almost surely, 2^55503838565 is an apocalyptic number.

It is an amenable number.

55503838565 is a deficient number, since it is larger than the sum of its proper divisors (23662722715).

55503838565 is a wasteful number, since it uses less digits than its factorization.

55503838565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542661.

The product of its (nonzero) digits is 10800000, while the sum is 53.

The spelling of 55503838565 in words is "fifty-five billion, five hundred three million, eight hundred thirty-eight thousand, five hundred sixty-five".