27475020891 has 12 divisors (see below), whose sum is σ = 39776548240. Its totient is φ = 18274954320.

The previous prime is 27475020871. The next prime is 27475020929. The reversal of 27475020891 is 19802057472.

It is a happy number.

27475020891 is a `hidden beast` number, since 27 + 47 + 502 + 0 + 89 + 1 = 666.

It is not a de Polignac number, because 27475020891 - 2⁷ = 27475020763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27475020841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473020 + ... + 3480921.

Almost surely, 2^27475020891 is an apocalyptic number.

27475020891 is a deficient number, since it is larger than the sum of its proper divisors (12301527349).

27475020891 is a wasteful number, since it uses less digits than its factorization.

27475020891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954386 (or 6954383 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 27475020891 in words is "twenty-seven billion, four hundred seventy-five million, twenty thousand, eight hundred ninety-one".