27220447723813 has 2 divisors, whose sum is σ = 27220447723814. Its totient is φ = 27220447723812.

The previous prime is 27220447723757. The next prime is 27220447723817. The reversal of 27220447723813 is 31832774402272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14646487747329 + 12573959976484 = 3827073^2 + 3545978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27220447723813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27220447723817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13610223861906 + 13610223861907.

It is an arithmetic number, because the mean of its divisors is an integer number (13610223861907).

Almost surely, 2^{27220447723813} is an apocalyptic number.

It is an amenable number.

27220447723813 is a deficient number, since it is larger than the sum of its proper divisors (1).

27220447723813 is an equidigital number, since it uses as much as digits as its factorization.

27220447723813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 52.

The spelling of 27220447723813 in words is "twenty-seven trillion, two hundred twenty billion, four hundred forty-seven million, seven hundred twenty-three thousand, eight hundred thirteen".