1005555055550 has 12 divisors (see below), whose sum is σ = 1870332403416. Its totient is φ = 402222022200.

The previous prime is 1005555055543. The next prime is 1005555055559. The reversal of 1005555055550 is 555505555001.

It is a super-2 number, since 2×1005555055550² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1005555055498 and 1005555055507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005555055559) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10055550506 + ... + 10055550605.

It is an arithmetic number, because the mean of its divisors is an integer number (155861033618).

Almost surely, 2^{1005555055550} is an apocalyptic number.

1005555055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1005555055550 is a deficient number, since it is larger than the sum of its proper divisors (864777347866).

1005555055550 is a wasteful number, since it uses less digits than its factorization.

1005555055550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20111101123 (or 20111101118 counting only the distinct ones).

The product of its (nonzero) digits is 390625, while the sum is 41.

The spelling of 1005555055550 in words is "one trillion, five billion, five hundred fifty-five million, fifty-five thousand, five hundred fifty".