27805952561 has 8 divisors (see below), whose sum is σ = 28184907648. Its totient is φ = 27429030000.

The previous prime is 27805952497. The next prime is 27805952567. The reversal of 27805952561 is 16525950872.

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

It is a cyclic number.

It is not a de Polignac number, because 27805952561 - 2⁶ = 27805952497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27805952567) 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, 480575 + ... + 535316.

It is an arithmetic number, because the mean of its divisors is an integer number (3523113456).

Almost surely, 2^27805952561 is an apocalyptic number.

It is an amenable number.

27805952561 is a deficient number, since it is larger than the sum of its proper divisors (378955087).

27805952561 is a wasteful number, since it uses less digits than its factorization.

27805952561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016263.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 27805952561 in words is "twenty-seven billion, eight hundred five million, nine hundred fifty-two thousand, five hundred sixty-one".