55005005550 has 48 divisors (see below), whose sum is σ = 148813546752. Its totient is φ = 13334546400.

The previous prime is 55005005507. The next prime is 55005005551. The reversal of 55005005550 is 5550050055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005005551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16666534 + ... + 16669833.

It is an arithmetic number, because the mean of its divisors is an integer number (3100282224).

Almost surely, 2^55005005550 is an apocalyptic number.

55005005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55005005550 is an abundant number, since it is smaller than the sum of its proper divisors (93808541202).

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

55005005550 is a wasteful number, since it uses less digits than its factorization.

55005005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33336393 (or 33336388 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 30.

The spelling of 55005005550 in words is "fifty-five billion, five million, five thousand, five hundred fifty".