27750561373 has 2 divisors, whose sum is σ = 27750561374. Its totient is φ = 27750561372.

The previous prime is 27750561331. The next prime is 27750561383. The reversal of 27750561373 is 37316505772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20292857209 + 7457704164 = 142453^2 + 86358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27750561373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27750561383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875280686 + 13875280687.

It is an arithmetic number, because the mean of its divisors is an integer number (13875280687).

Almost surely, 2^27750561373 is an apocalyptic number.

It is an amenable number.

27750561373 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750561373 is an equidigital number, since it uses as much as digits as its factorization.

27750561373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 926100, while the sum is 46.

The spelling of 27750561373 in words is "twenty-seven billion, seven hundred fifty million, five hundred sixty-one thousand, three hundred seventy-three".