2543321660 has 24 divisors (see below), whose sum is σ = 5826519216. Its totient is φ = 924844160.

The previous prime is 2543321659. The next prime is 2543321687. The reversal of 2543321660 is 661233452.

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 7 ways as a sum of consecutive naturals, for example, 5780057 + ... + 5780496.

It is an arithmetic number, because the mean of its divisors is an integer number (242771634).

Almost surely, 2^2543321660 is an apocalyptic number.

2543321660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543321660 is an abundant number, since it is smaller than the sum of its proper divisors (3283197556).

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

2543321660 is a wasteful number, since it uses less digits than its factorization.

2543321660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11560573 (or 11560571 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 2543321660 is about 50431.3559206968. The cubic root of 2543321660 is about 1365.0034948275.

The spelling of 2543321660 in words is "two billion, five hundred forty-three million, three hundred twenty-one thousand, six hundred sixty".