27650568670561 has 4 divisors (see below), whose sum is σ = 27650728421892. Its totient is φ = 27650408919232.

The previous prime is 27650568670553. The next prime is 27650568670583. The reversal of 27650568670561 is 16507686505672.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25207227662400 + 2443341008161 = 5020680^2 + 1563119^2 .

It is a cyclic number.

It is not a de Polignac number, because 27650568670561 - 2³ = 27650568670553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27650568670493 and 27650568670502.

It is not an unprimeable number, because it can be changed into a prime (27650568670591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79615756 + ... + 79962301.

It is an arithmetic number, because the mean of its divisors is an integer number (6912682105473).

Almost surely, 2^{27650568670561} is an apocalyptic number.

It is an amenable number.

27650568670561 is a deficient number, since it is larger than the sum of its proper divisors (159751331).

27650568670561 is a wasteful number, since it uses less digits than its factorization.

27650568670561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159751330.

The product of its (nonzero) digits is 127008000, while the sum is 64.

The spelling of 27650568670561 in words is "twenty-seven trillion, six hundred fifty billion, five hundred sixty-eight million, six hundred seventy thousand, five hundred sixty-one".