27770215129 has 2 divisors, whose sum is σ = 27770215130. Its totient is φ = 27770215128.

The previous prime is 27770215093. The next prime is 27770215171. The reversal of 27770215129 is 92151207772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19959190729 + 7811024400 = 141277^2 + 88380^2 .

It is a cyclic number.

It is not a de Polignac number, because 27770215129 - 2²⁹ = 27233344217 is a prime.

It is not a weakly prime, because it can be changed into another prime (27770216129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13885107564 + 13885107565.

It is an arithmetic number, because the mean of its divisors is an integer number (13885107565).

Almost surely, 2^27770215129 is an apocalyptic number.

It is an amenable number.

27770215129 is a deficient number, since it is larger than the sum of its proper divisors (1).

27770215129 is an equidigital number, since it uses as much as digits as its factorization.

27770215129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 123480, while the sum is 43.

The spelling of 27770215129 in words is "twenty-seven billion, seven hundred seventy million, two hundred fifteen thousand, one hundred twenty-nine".