6561123244 has 48 divisors (see below), whose sum is σ = 13581953280. Its totient is φ = 2744089920.

The previous prime is 6561123227. The next prime is 6561123269. The reversal of 6561123244 is 4423211656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121642 + ... + 167089.

It is an arithmetic number, because the mean of its divisors is an integer number (282957360).

Almost surely, 2^6561123244 is an apocalyptic number.

It is an amenable number.

6561123244 is an abundant number, since it is smaller than the sum of its proper divisors (7020830036).

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

6561123244 is a wasteful number, since it uses less digits than its factorization.

6561123244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288790 (or 288788 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 6561123244 is about 81000.7607618595. The cubic root of 6561123244 is about 1872.0871625686.

The spelling of 6561123244 in words is "six billion, five hundred sixty-one million, one hundred twenty-three thousand, two hundred forty-four".