1205055225500 has 96 divisors (see below), whose sum is σ = 3184748461440. Its totient is φ = 388858137600.

The previous prime is 1205055225499. The next prime is 1205055225509. The reversal of 1205055225500 is 55225505021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205055225509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10067015 + ... + 10186014.

It is an arithmetic number, because the mean of its divisors is an integer number (33174463140).

Almost surely, 2^{1205055225500} is an apocalyptic number.

1205055225500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205055225500 is an abundant number, since it is smaller than the sum of its proper divisors (1979693235940).

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

1205055225500 is a wasteful number, since it uses less digits than its factorization.

1205055225500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20253072 (or 20253060 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 32.

The spelling of 1205055225500 in words is "one trillion, two hundred five billion, fifty-five million, two hundred twenty-five thousand, five hundred".