2011204405540 has 96 divisors (see below), whose sum is σ = 4669854529536. Its totient is φ = 721473287040.

The previous prime is 2011204405519. The next prime is 2011204405547. The reversal of 2011204405540 is 455044021102.

It is a junction number, because it is equal to n+sod(n) for n = 2011204405499 and 2011204405508.

It is not an unprimeable number, because it can be changed into a prime (2011204405547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12390949 + ... + 12552211.

It is an arithmetic number, because the mean of its divisors is an integer number (48644318016).

Almost surely, 2^{2011204405540} is an apocalyptic number.

2011204405540 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 2011204405540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2334927264768).

2011204405540 is an abundant number, since it is smaller than the sum of its proper divisors (2658650123996).

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

2011204405540 is a wasteful number, since it uses less digits than its factorization.

2011204405540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162049 (or 162047 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 2011204405540 its reverse (455044021102), we get a palindrome (2466248426642).

The spelling of 2011204405540 in words is "two trillion, eleven billion, two hundred four million, four hundred five thousand, five hundred forty".