27420097865 has 8 divisors (see below), whose sum is σ = 32910465480. Its totient is φ = 21931846272.

The previous prime is 27420097853. The next prime is 27420097921. The reversal of 27420097865 is 56879002472.

It can be written as a sum of positive squares in 4 ways, for example, as 20082290944 + 7337806921 = 141712^2 + 85661^2 .

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 27420097865 - 2²⁴ = 27403320649 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500354 + ... + 552443.

It is an arithmetic number, because the mean of its divisors is an integer number (4113808185).

Almost surely, 2^27420097865 is an apocalyptic number.

It is an amenable number.

27420097865 is a deficient number, since it is larger than the sum of its proper divisors (5490367615).

27420097865 is a wasteful number, since it uses less digits than its factorization.

27420097865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058011.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 27420097865 in words is "twenty-seven billion, four hundred twenty million, ninety-seven thousand, eight hundred sixty-five".