6909536561 has 8 divisors (see below), whose sum is σ = 7277486400. Its totient is φ = 6542015760.

The previous prime is 6909536531. The next prime is 6909536567. The reversal of 6909536561 is 1656359096.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6909536561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6909536567) 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, 73925 + ... + 138866.

It is an arithmetic number, because the mean of its divisors is an integer number (909685800).

Almost surely, 2^6909536561 is an apocalyptic number.

It is an amenable number.

6909536561 is a deficient number, since it is larger than the sum of its proper divisors (367949839).

6909536561 is a wasteful number, since it uses less digits than its factorization.

6909536561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214519.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The square root of 6909536561 is about 83123.6221600094. The cubic root of 6909536561 is about 1904.6549353760.

The spelling of 6909536561 in words is "six billion, nine hundred nine million, five hundred thirty-six thousand, five hundred sixty-one".