27727124609 has 2 divisors, whose sum is σ = 27727124610. Its totient is φ = 27727124608.

The previous prime is 27727124603. The next prime is 27727124629. The reversal of 27727124609 is 90642172772.

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., 19698964609 + 8028160000 = 140353^2 + 89600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27727124609 is a prime.

It is not a weakly prime, because it can be changed into another prime (27727124603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863562304 + 13863562305.

It is an arithmetic number, because the mean of its divisors is an integer number (13863562305).

Almost surely, 2^27727124609 is an apocalyptic number.

It is an amenable number.

27727124609 is a deficient number, since it is larger than the sum of its proper divisors (1).

27727124609 is an equidigital number, since it uses as much as digits as its factorization.

27727124609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 592704, while the sum is 47.

The spelling of 27727124609 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred twenty-four thousand, six hundred nine".