1005505501020 has 24 divisors (see below), whose sum is σ = 2815415403024. Its totient is φ = 268134800256.

The previous prime is 1005505501019. The next prime is 1005505501051. The reversal of 1005505501020 is 201055055001.

It is a super-2 number, since 2×1005505501020² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8379212449 + ... + 8379212568.

It is an arithmetic number, because the mean of its divisors is an integer number (117308975126).

Almost surely, 2^{1005505501020} is an apocalyptic number.

1005505501020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005505501020 is an abundant number, since it is smaller than the sum of its proper divisors (1809909902004).

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

1005505501020 is a wasteful number, since it uses less digits than its factorization.

1005505501020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758425029 (or 16758425027 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The spelling of 1005505501020 in words is "one trillion, five billion, five hundred five million, five hundred one thousand, twenty".