2118554403840 has 3168 divisors, whose sum is σ = 9785354342400. Its totient is φ = 436431421440.

The previous prime is 2118554403829. The next prime is 2118554403883. The reversal of 2118554403840 is 483044558112.

2118554403840 is a `hidden beast` number, since 2 + 1 + 18 + 554 + 4 + 0 + 3 + 84 + 0 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 35907701731 + ... + 35907701789.

Almost surely, 2^{2118554403840} is an apocalyptic number.

2118554403840 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 2118554403840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4892677171200).

2118554403840 is an abundant number, since it is smaller than the sum of its proper divisors (7666799938560).

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

2118554403840 is a wasteful number, since it uses less digits than its factorization.

2118554403840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 2118554403840 in words is "two trillion, one hundred eighteen billion, five hundred fifty-four million, four hundred three thousand, eight hundred forty".