27564485572261 has 8 divisors (see below), whose sum is σ = 30286681336800. Its totient is φ = 24878345381040.

The previous prime is 27564485572259. The next prime is 27564485572291. The reversal of 27564485572261 is 16227558446572.

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 27564485572261 - 2¹ = 27564485572259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27564485572193 and 27564485572202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27564485572291) 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, 9013891726 + ... + 9013894783.

It is an arithmetic number, because the mean of its divisors is an integer number (3785835167100).

Almost surely, 2^{27564485572261} is an apocalyptic number.

It is an amenable number.

27564485572261 is a deficient number, since it is larger than the sum of its proper divisors (2722195764539).

27564485572261 is a wasteful number, since it uses less digits than its factorization.

27564485572261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18027786659.

The product of its digits is 225792000, while the sum is 64.

The spelling of 27564485572261 in words is "twenty-seven trillion, five hundred sixty-four billion, four hundred eighty-five million, five hundred seventy-two thousand, two hundred sixty-one".