2118949797888 has 828 divisors, whose sum is σ = 7925019022752. Its totient is φ = 550376570880.

The previous prime is 2118949797841. The next prime is 2118949797917. The reversal of 2118949797888 is 8887979498112.

2118949797888 is a `hidden beast` number, since 2 + 118 + 9 + 497 + 9 + 7 + 8 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a nude number because it is divisible by every one of its digits.

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 35 ways as a sum of consecutive naturals, for example, 192631799803 + ... + 192631799813.

Almost surely, 2^{2118949797888} is an apocalyptic number.

2118949797888 is a gapful number since it is divisible by the number (28) 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 2118949797888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3962509511376).

2118949797888 is an abundant number, since it is smaller than the sum of its proper divisors (5806069224864).

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

2118949797888 is an frugal number, since it uses more digits than its factorization.

2118949797888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 23 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 81.

The spelling of 2118949797888 in words is "two trillion, one hundred eighteen billion, nine hundred forty-nine million, seven hundred ninety-seven thousand, eight hundred eighty-eight".