55663838859 has 16 divisors (see below), whose sum is σ = 75904611840. Its totient is φ = 36268376160.

The previous prime is 55663838833. The next prime is 55663838891. The reversal of 55663838859 is 95883836655.

It is not a de Polignac number, because 55663838859 - 2¹⁵ = 55663806091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55663838859.

It is not an unprimeable number, because it can be changed into a prime (55663833859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178437 + ... + 378374.

It is an arithmetic number, because the mean of its divisors is an integer number (4744038240).

Almost surely, 2^55663838859 is an apocalyptic number.

55663838859 is a deficient number, since it is larger than the sum of its proper divisors (20240772981).

55663838859 is a wasteful number, since it uses less digits than its factorization.

55663838859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557570.

The product of its digits is 186624000, while the sum is 66.

The spelling of 55663838859 in words is "fifty-five billion, six hundred sixty-three million, eight hundred thirty-eight thousand, eight hundred fifty-nine".