27748363817 has 2 divisors, whose sum is σ = 27748363818. Its totient is φ = 27748363816.

The previous prime is 27748363723. The next prime is 27748363859. The reversal of 27748363817 is 71836384772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21560810896 + 6187552921 = 146836^2 + 78661^2 .

It is a cyclic number.

It is not a de Polignac number, because 27748363817 - 2¹⁸ = 27748101673 is a prime.

It is not a weakly prime, because it can be changed into another prime (27748363217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13874181908 + 13874181909.

It is an arithmetic number, because the mean of its divisors is an integer number (13874181909).

Almost surely, 2^27748363817 is an apocalyptic number.

It is an amenable number.

27748363817 is a deficient number, since it is larger than the sum of its proper divisors (1).

27748363817 is an equidigital number, since it uses as much as digits as its factorization.

27748363817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 56.

The spelling of 27748363817 in words is "twenty-seven billion, seven hundred forty-eight million, three hundred sixty-three thousand, eight hundred seventeen".