27460721693 has 2 divisors, whose sum is σ = 27460721694. Its totient is φ = 27460721692.

The previous prime is 27460721681. The next prime is 27460721719. The reversal of 27460721693 is 39612706472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18967624729 + 8493096964 = 137723^2 + 92158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27460721693 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27460621693) 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, 13730360846 + 13730360847.

It is an arithmetic number, because the mean of its divisors is an integer number (13730360847).

Almost surely, 2^27460721693 is an apocalyptic number.

It is an amenable number.

27460721693 is a deficient number, since it is larger than the sum of its proper divisors (1).

27460721693 is an equidigital number, since it uses as much as digits as its factorization.

27460721693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 27460721693 in words is "twenty-seven billion, four hundred sixty million, seven hundred twenty-one thousand, six hundred ninety-three".