1055511005550 has 96 divisors (see below), whose sum is σ = 2734058009088. Its totient is φ = 268977582720.

The previous prime is 1055511005473. The next prime is 1055511005551. The reversal of 1055511005550 is 555001155501.

It is a super-2 number, since 2×1055511005550² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055511005551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3523444 + ... + 3811256.

It is an arithmetic number, because the mean of its divisors is an integer number (28479770928).

Almost surely, 2^{1055511005550} is an apocalyptic number.

1055511005550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1055511005550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367029004544).

1055511005550 is an abundant number, since it is smaller than the sum of its proper divisors (1678547003538).

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

1055511005550 is a wasteful number, since it uses less digits than its factorization.

1055511005550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288914 (or 288909 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 1055511005550 in words is "one trillion, fifty-five billion, five hundred eleven million, five thousand, five hundred fifty".