27665227913 has 16 divisors (see below), whose sum is σ = 29375881920. Its totient is φ = 25981010496.

The previous prime is 27665227901. The next prime is 27665227927. The reversal of 27665227913 is 31972256672.

It is a cyclic number.

It is not a de Polignac number, because 27665227913 - 2⁴ = 27665227897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27665527913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023470 + ... + 1050152.

It is an arithmetic number, because the mean of its divisors is an integer number (1835992620).

Almost surely, 2^27665227913 is an apocalyptic number.

It is an amenable number.

27665227913 is a deficient number, since it is larger than the sum of its proper divisors (1710654007).

27665227913 is a wasteful number, since it uses less digits than its factorization.

27665227913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27176.

The product of its digits is 1905120, while the sum is 50.

The spelling of 27665227913 in words is "twenty-seven billion, six hundred sixty-five million, two hundred twenty-seven thousand, nine hundred thirteen".