205055245121180 has 48 divisors (see below), whose sum is σ = 456329839069440. Its totient is φ = 77262194956800.

The previous prime is 205055245121179. The next prime is 205055245121197. The reversal of 205055245121180 is 81121542550502.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4311482636 + ... + 4311530195.

It is an arithmetic number, because the mean of its divisors is an integer number (9506871647280).

Almost surely, 2^{205055245121180} is an apocalyptic number.

205055245121180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205055245121180 is an abundant number, since it is smaller than the sum of its proper divisors (251274593948260).

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

205055245121180 is a wasteful number, since it uses less digits than its factorization.

205055245121180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8623012910 (or 8623012908 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 41.

Adding to 205055245121180 its reverse (81121542550502), we get a palindrome (286176787671682).

The spelling of 205055245121180 in words is "two hundred five trillion, fifty-five billion, two hundred forty-five million, one hundred twenty-one thousand, one hundred eighty".