27964239991 has 2 divisors, whose sum is σ = 27964239992. Its totient is φ = 27964239990.

The previous prime is 27964239931. The next prime is 27964239997. The reversal of 27964239991 is 19993246972.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27964239991 - 2¹⁵ = 27964207223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27964239997) 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 as a sum of consecutive naturals, namely, 13982119995 + 13982119996.

It is an arithmetic number, because the mean of its divisors is an integer number (13982119996).

Almost surely, 2^27964239991 is an apocalyptic number.

27964239991 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964239991 is an equidigital number, since it uses as much as digits as its factorization.

27964239991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 61.

The spelling of 27964239991 in words is "twenty-seven billion, nine hundred sixty-four million, two hundred thirty-nine thousand, nine hundred ninety-one".