1811680861180 has 12 divisors (see below), whose sum is σ = 3804529808520. Its totient is φ = 724672344464.

The previous prime is 1811680861171. The next prime is 1811680861181. The reversal of 1811680861180 is 811680861181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1811680861181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45292021510 + ... + 45292021549.

It is an arithmetic number, because the mean of its divisors is an integer number (317044150710).

Almost surely, 2^{1811680861180} is an apocalyptic number.

1811680861180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1811680861180 is an abundant number, since it is smaller than the sum of its proper divisors (1992848947340).

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

1811680861180 is a wasteful number, since it uses less digits than its factorization.

1811680861180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90584043068 (or 90584043066 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 49.

Subtracting from 1811680861180 its reverse (811680861181), we obtain a palindrome (999999999999).

The spelling of 1811680861180 in words is "one trillion, eight hundred eleven billion, six hundred eighty million, eight hundred sixty-one thousand, one hundred eighty".