27750027752729 has 2 divisors, whose sum is σ = 27750027752730. Its totient is φ = 27750027752728.

The previous prime is 27750027752723. The next prime is 27750027752761. The reversal of 27750027752729 is 92725772005772.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27428054352400 + 321973400329 = 5237180^2 + 567427^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27750027752729 is a prime.

It is not a weakly prime, because it can be changed into another prime (27750027752723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13875013876364 + 13875013876365.

It is an arithmetic number, because the mean of its divisors is an integer number (13875013876365).

Almost surely, 2^{27750027752729} is an apocalyptic number.

It is an amenable number.

27750027752729 is a deficient number, since it is larger than the sum of its proper divisors (1).

27750027752729 is an equidigital number, since it uses as much as digits as its factorization.

27750027752729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60505200, while the sum is 62.

The spelling of 27750027752729 in words is "twenty-seven trillion, seven hundred fifty billion, twenty-seven million, seven hundred fifty-two thousand, seven hundred twenty-nine".