12055565540 has 24 divisors (see below), whose sum is σ = 25324814592. Its totient is φ = 4820678240.

The previous prime is 12055565537. The next prime is 12055565549. The reversal of 12055565540 is 4556555021.

It is a junction number, because it is equal to n+sod(n) for n = 12055565494 and 12055565503.

It is not an unprimeable number, because it can be changed into a prime (12055565549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31826 + ... + 158505.

It is an arithmetic number, because the mean of its divisors is an integer number (1055200608).

Almost surely, 2^12055565540 is an apocalyptic number.

12055565540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12055565540 is an abundant number, since it is smaller than the sum of its proper divisors (13269249052).

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

12055565540 is a wasteful number, since it uses less digits than its factorization.

12055565540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193507 (or 193505 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 12055565540 in words is "twelve billion, fifty-five million, five hundred sixty-five thousand, five hundred forty".