2218603861908 has 144 divisors (see below), whose sum is σ = 6983072691840. Its totient is φ = 596599299072.

The previous prime is 2218603861861. The next prime is 2218603861919. The reversal of 2218603861908 is 8091683068122.

2218603861908 is a `hidden beast` number, since 2 + 2 + 18 + 6 + 0 + 3 + 8 + 619 + 0 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4858785 + ... + 5295752.

It is an arithmetic number, because the mean of its divisors is an integer number (48493560360).

Almost surely, 2^{2218603861908} is an apocalyptic number.

2218603861908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2218603861908 is an abundant number, since it is smaller than the sum of its proper divisors (4764468829932).

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

2218603861908 is a wasteful number, since it uses less digits than its factorization.

2218603861908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154591 (or 10154566 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 2218603861908 in words is "two trillion, two hundred eighteen billion, six hundred three million, eight hundred sixty-one thousand, nine hundred eight".