1000556105550 has 24 divisors (see below), whose sum is σ = 2481379142136. Its totient is φ = 266814961440.

The previous prime is 1000556105467. The next prime is 1000556105557. The reversal of 1000556105550 is 555016550001.

It is a super-2 number, since 2×1000556105550² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000556105557) 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 11 ways as a sum of consecutive naturals, for example, 3335186869 + ... + 3335187168.

It is an arithmetic number, because the mean of its divisors is an integer number (103390797589).

Almost surely, 2^{1000556105550} is an apocalyptic number.

1000556105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000556105550 is an abundant number, since it is smaller than the sum of its proper divisors (1480823036586).

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

1000556105550 is a wasteful number, since it uses less digits than its factorization.

1000556105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670374052 (or 6670374047 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 33.

The spelling of 1000556105550 in words is "one trillion, five hundred fifty-six million, one hundred five thousand, five hundred fifty".