27965431979 has 16 divisors (see below), whose sum is σ = 30434703360. Its totient is φ = 25598592000.

The previous prime is 27965431973. The next prime is 27965431999. The reversal of 27965431979 is 97913456972.

It is a cyclic number.

It is not a de Polignac number, because 27965431979 - 2¹² = 27965427883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27965431973) 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, 340514 + ... + 414584.

It is an arithmetic number, because the mean of its divisors is an integer number (1902168960).

Almost surely, 2^27965431979 is an apocalyptic number.

27965431979 is a deficient number, since it is larger than the sum of its proper divisors (2469271381).

27965431979 is a wasteful number, since it uses less digits than its factorization.

27965431979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74762.

The product of its digits is 25719120, while the sum is 62.

The spelling of 27965431979 in words is "twenty-seven billion, nine hundred sixty-five million, four hundred thirty-one thousand, nine hundred seventy-nine".