55055809998 has 80 divisors (see below), whose sum is σ = 143379308160. Its totient is φ = 15463598544.

The previous prime is 55055809997. The next prime is 55055810021. The reversal of 55055809998 is 89990855055.

It is a super-2 number, since 2×55055809998² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055809997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 344536 + ... + 478347.

It is an arithmetic number, because the mean of its divisors is an integer number (1792241352).

Almost surely, 2^55055809998 is an apocalyptic number.

55055809998 is an abundant number, since it is smaller than the sum of its proper divisors (88323498162).

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

55055809998 is a wasteful number, since it uses less digits than its factorization.

55055809998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822963 (or 822954 counting only the distinct ones).

The product of its (nonzero) digits is 29160000, while the sum is 63.

The spelling of 55055809998 in words is "fifty-five billion, fifty-five million, eight hundred nine thousand, nine hundred ninety-eight".