2118458880 has 160 divisors (see below), whose sum is σ = 7525188000. Its totient is φ = 564903936.

The previous prime is 2118458857. The next prime is 2118458891. The reversal of 2118458880 is 888548112.

2118458880 is a `hidden beast` number, since 2 + 118 + 458 + 8 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53796 + ... + 84444.

It is an arithmetic number, because the mean of its divisors is an integer number (47032425).

Almost surely, 2^2118458880 is an apocalyptic number.

2118458880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2118458880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3762594000).

2118458880 is an abundant number, since it is smaller than the sum of its proper divisors (5406729120).

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

2118458880 is an equidigital number, since it uses as much as digits as its factorization.

2118458880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30681 (or 30659 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 45.

The square root of 2118458880 is about 46026.7191965710. The cubic root of 2118458880 is about 1284.3202974198.

The spelling of 2118458880 in words is "two billion, one hundred eighteen million, four hundred fifty-eight thousand, eight hundred eighty".