27272913691 has 2 divisors, whose sum is σ = 27272913692. Its totient is φ = 27272913690.

The previous prime is 27272913677. The next prime is 27272913719. The reversal of 27272913691 is 19631927272.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27272913691 - 2¹⁵ = 27272880923 is a prime.

It is not a weakly prime, because it can be changed into another prime (27272913631) by changing a digit.

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 as a sum of consecutive naturals, namely, 13636456845 + 13636456846.

It is an arithmetic number, because the mean of its divisors is an integer number (13636456846).

Almost surely, 2^27272913691 is an apocalyptic number.

27272913691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27272913691 is an equidigital number, since it uses as much as digits as its factorization.

27272913691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 49.

The spelling of 27272913691 in words is "twenty-seven billion, two hundred seventy-two million, nine hundred thirteen thousand, six hundred ninety-one".