27072072691 has 2 divisors, whose sum is σ = 27072072692. Its totient is φ = 27072072690.

The previous prime is 27072072661. The next prime is 27072072749. The reversal of 27072072691 is 19627027072.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27072072691 - 2¹¹ = 27072070643 is a prime.

It is not a weakly prime, because it can be changed into another prime (27072072661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13536036345 + 13536036346.

It is an arithmetic number, because the mean of its divisors is an integer number (13536036346).

Almost surely, 2^27072072691 is an apocalyptic number.

27072072691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27072072691 is an equidigital number, since it uses as much as digits as its factorization.

27072072691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 43.

The spelling of 27072072691 in words is "twenty-seven billion, seventy-two million, seventy-two thousand, six hundred ninety-one".