2180218366746 has 128 divisors (see below), whose sum is σ = 5864041820160. Its totient is φ = 586942842816.

The previous prime is 2180218366741. The next prime is 2180218366759. The reversal of 2180218366746 is 6476638120812.

It is a happy number.

2180218366746 is a `hidden beast` number, since 21 + 8 + 0 + 218 + 366 + 7 + 46 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 2180218366692 and 2180218366701.

It is not an unprimeable number, because it can be changed into a prime (2180218366741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1288941 + ... + 2453936.

It is an arithmetic number, because the mean of its divisors is an integer number (45812826720).

Almost surely, 2^{2180218366746} is an apocalyptic number.

2180218366746 is an abundant number, since it is smaller than the sum of its proper divisors (3683823453414).

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

2180218366746 is a wasteful number, since it uses less digits than its factorization.

2180218366746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742985 (or 3742979 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 2180218366746 in words is "two trillion, one hundred eighty billion, two hundred eighteen million, three hundred sixty-six thousand, seven hundred forty-six".