6561242105 has 8 divisors (see below), whose sum is σ = 8589262464. Its totient is φ = 4771812400.

The previous prime is 6561242059. The next prime is 6561242137. The reversal of 6561242105 is 5012421656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6561242105 - 2⁶ = 6561242041 is a prime.

It is a Duffinian number.

It is a Curzon 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, 59647601 + ... + 59647710.

It is an arithmetic number, because the mean of its divisors is an integer number (1073657808).

Almost surely, 2^6561242105 is an apocalyptic number.

It is an amenable number.

6561242105 is a deficient number, since it is larger than the sum of its proper divisors (2028020359).

6561242105 is a wasteful number, since it uses less digits than its factorization.

6561242105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119295327.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 6561242105 is about 81001.4944615221. The cubic root of 6561242105 is about 1872.0984673814.

The spelling of 6561242105 in words is "six billion, five hundred sixty-one million, two hundred forty-two thousand, one hundred five".