27725707729 has 2 divisors, whose sum is σ = 27725707730. Its totient is φ = 27725707728.

The previous prime is 27725707703. The next prime is 27725707747. The reversal of 27725707729 is 92770752772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22674336400 + 5051371329 = 150580^2 + 71073^2 .

It is a cyclic number.

It is not a de Polignac number, because 27725707729 - 2⁷ = 27725707601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27725707729.

It is not a weakly prime, because it can be changed into another prime (27725707759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13862853864 + 13862853865.

It is an arithmetic number, because the mean of its divisors is an integer number (13862853865).

Almost surely, 2^27725707729 is an apocalyptic number.

It is an amenable number.

27725707729 is a deficient number, since it is larger than the sum of its proper divisors (1).

27725707729 is an equidigital number, since it uses as much as digits as its factorization.

27725707729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6050520, while the sum is 55.

The spelling of 27725707729 in words is "twenty-seven billion, seven hundred twenty-five million, seven hundred seven thousand, seven hundred twenty-nine".