12011554355440 has 40 divisors (see below), whose sum is σ = 27934919573040. Its totient is φ = 4803235815936.

The previous prime is 12011554355417. The next prime is 12011554355459. The reversal of 12011554355440 is 4455345511021.

12011554355440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 12011554355393 and 12011554355402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21376005 + ... + 21930724.

It is an arithmetic number, because the mean of its divisors is an integer number (698372989326).

Almost surely, 2^{12011554355440} is an apocalyptic number.

12011554355440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011554355440 is an abundant number, since it is smaller than the sum of its proper divisors (15923365217600).

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

12011554355440 is a wasteful number, since it uses less digits than its factorization.

12011554355440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43310209 (or 43310203 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

Adding to 12011554355440 its reverse (4455345511021), we get a palindrome (16466899866461).

The spelling of 12011554355440 in words is "twelve trillion, eleven billion, five hundred fifty-four million, three hundred fifty-five thousand, four hundred forty".