27494192521 has 4 divisors (see below), whose sum is σ = 27563447812. Its totient is φ = 27424937232.

The previous prime is 27494192483. The next prime is 27494192527. The reversal of 27494192521 is 12529149472.

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 14783884921 + 12710307600 = 121589^2 + 112740^2 .

It is a cyclic number.

It is not a de Polignac number, because 27494192521 - 2¹³ = 27494184329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27494192527) 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, 34627050 + ... + 34627843.

It is an arithmetic number, because the mean of its divisors is an integer number (6890861953).

Almost surely, 2^27494192521 is an apocalyptic number.

It is an amenable number.

27494192521 is a deficient number, since it is larger than the sum of its proper divisors (69255291).

27494192521 is an equidigital number, since it uses as much as digits as its factorization.

27494192521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69255290.

The product of its digits is 362880, while the sum is 46.

The spelling of 27494192521 in words is "twenty-seven billion, four hundred ninety-four million, one hundred ninety-two thousand, five hundred twenty-one".